Why can't install the application on android. "Application Not Installed" Error: Causes and Fixes

A large number of interesting applications and games have been created under the Android OS. You can find them in the Google Play Store branded store, or on the Internet: forums and thematic sites. But what to do when applications on Android are not installed, despite the fact that you have a new phone with high performance? There can be many problems in this case: lack of free space, damage to the operating system by a virus, and others. Let's take a closer look at the most common of them, and find out how they can be avoided.

The main problem due to which your favorite game or application may not be installed on your phone is the lack of free memory space. This may be due to a large number of multimedia files that occupy the memory of a smartphone or tablet:

• Photo.
• Music.
• Other applications and games installed in the internal memory of the phone.

In this case, it is recommended to clear the internal memory of the device in manual mode. At the same time, deleting unnecessary or rarely launched application files through the programs tab located in the menu system settings. Another solution to this problem may be to transfer them to a mircoSD card.

But in most cases, you can clear the memory using third-party programs that will help get rid of the application cache, browsers, and other garbage. One of the most popular utilities of this kind is Clean Master, which you can download from the play store for free. Clearing the cache in it takes place in one click, the application also knows how to optimize system performance and clear RAM. We recommend watching a tutorial video on working with the application and its main functions.

Virus cleaning

The defeat of the smartphone OS by a virus is another possible cause, which can stop installing applications on Android. You can bring them to your device by viewing unsecured web pages in a browser or by installing unverified apk files. In order to avoid such problems, it is recommended to install antivirus software. By enabling the active background mode, the utility will timely respond to the arrival of an infected file into the system and block it. Similar antivirus programs there are many in the play store: Dr.Web, Kaspersky Internet Security, McAfee Mobile Security, etc.

To check your device for viruses using the Kaspersky Internet Security utility, you must do the following:

• Launch antivirus software.
• Go to the quick scan tab.
• Press the "start" button.
• After waiting for the result, you will be prompted to choose an action on the detected viruses (quarantine, disinfect or delete).

In the event that the smartphone is infected with a virus and it is impossible to install anti-virus software on it, the situation becomes a little more complicated. You can try to manually search for a malicious file and delete it through file manager. If this method did not help, then you need to check the phone's memory with an antivirus from another device or roll back to the factory settings. Damaged or inaccessible SD card

When you try to transfer or install the application directly to the SD card, you may receive the error "memory card is damaged or inaccessible." In this case, you must first check the corresponding slot in your smartphone or tablet. If the card is inserted correctly, but the error remains, then most likely it is out of order, since solid state drives have a limited life cycle.

In the case when it is displayed in the file manager, you can try to revive it. To do this, it is enough to format directly from the phone or through Personal Computer by inserting the SD card into the card reader beforehand.

There are other problems associated with installing programs on Android, which have their own solution methods. In most cases, they are to blame for system errors caused by incorrect flashing of the device OS. Therefore, it is recommended to use only official updates released by developers specifically for your smartphone model.

In this article, I will tell you about the ten most common reasons why programs do not install. You will learn about the symptoms of a particular cause and be able to diagnose and eliminate it yourself.

So, let's go - a dozen reasons why programs on Windows are not installed.

The most common reason why programs are not installed is the lack of the required version of the NET Framework system library. This library contains resources that are needed for the normal operation of a particular program. Therefore, if it is not there, then the program will not be able to install.

It is recommended that you install all versions of the NET Framework on your computer, starting with 2.0 and ending with the oldest version that your Windows supports. This will ensure the normal operation of all programs compatible with your OS.

To find out which version of the NET Framework is installed on your computer, click on the "Start" button, select "Control Panel", then open the "Programs" section, and then "Programs and Features" (example for Windows 7).

You can download the versions that you are missing on the Microsoft website, .

As a rule, if programs are not installed due to the lack of the required NET Framework, a message appears indicating the version that needs to be downloaded.

Lack of Visual C++ and Direct X required version

The next common reason why programs fail to install is the lack of Visual C++ and Direct X components. Visual C++ is required for programs that are written in the popular C++ language, and Direct X is required for most games. As with the NET Framework, there are different versions of these components.

You can find out the version of Visual C ++ in the same way as you can find the NET Framework - in the "Programs and Features" section.

And in order to find out the version of Direct X, click "Start" and open "Run" (or ctrl + R). Write down the dxdiag command and click OK.

As a rule, if the program is not installed due to the absence of these components or their correct version, a corresponding message appears. The required versions of Visual C++ can be downloaded, and Direct X .

Incorrect bitness of Windows

Windows can be 32 or 64 bit. For 64-bit Operating Systems You can install 32 and 64 bit programs. And on 32-bit systems, only a 32-bit program will work. Therefore, you will not be able to install a 64-bit program on it.

To determine the bit depth of the system, click right click to "Computer" and select "Properties".

The capacity of the program can be found in its description. If it does not fit, then an appropriate error will appear during the installation process.

Corrupted installation file

If during the installation of the program an error occurs that the installation file is damaged, then you should get this file again. This can happen due to the fact that the program file has not been completely downloaded, or has been posted on the site already damaged. To solve the problem, you need to try to download the program installation file from another location.

Missing Required DLL

A rare reason why programs are not installed is the absence of some libraries in the system that should have been in it by default. This happens if you use an unofficial Windows assembly or those libraries were removed intentionally.

The problem manifests itself in a message that swears at some DLL file.

To solve it, you need to download the required DLL file and place it in the correct directory (in system32 or SysWOW64). You can download the libraries.

After that, you should register the library. To do this, click "Start" and select "Run" (or keys ctrl + R). Then write cmd and click OK. IN command line libraries are registered with the regsvr32 file.dll command, where file.dll is the name of the library file.

Software build curves

A common reason why programs are not installed is the crooked hands of pirates who hack them and give them to you for free, or somehow modify them, that is, make their own assembly (repack). To avoid this, check out the comments of those who have already tried what you are installing.

It is difficult to say what errors can be when installing such programs. It could be anything.

Without administrator rights

If you work in an office, then you may find that your user does not have administrator rights. Your system administrator may have deliberately prevented the installation of programs. To resolve this, contact him for help.

This can happen not only in the office, but also at home if your user on the PC does not have administrator rights.

Blocking by security programs

All computers have antiviruses and some software can be blocked by them. This is also a common reason why programs are not installed. Solving it is simple - disable your antivirus or other security program and install the program. If necessary, add this software to the trusted list in the antivirus or security program.

Be carefull. If you are not sure about the reliability of the source of the program, then it is better not to install it if the antivirus swears.

Conflicts with incompletely removed old versions of programs

If you are updating a version of the program, and first uninstalled the old one, and then try to install the new one, then a conflict may occur if the components of the old version were not completely removed. This often happens when using the standard Windows uninstaller.

To fix this issue, you must uninstall all components of the previous version manually. You can also use cleaner programs such as CCLeaner.

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Imagine the situation: you want to install a new game or Viber messenger on your Android tablet or phone, but there is no download or installation. The application refuses to install, the loading bar seems to take forever, or there is an "out of memory" error at all. The problem is common and easily solved.

There may be several reasons:

• not enough space in the internal memory;
• download failed due to viruses;
• custom unstable firmware is installed on the device;
• Internet connection is not stable;
• not enough mobile internet traffic.

As with many other crashes, the problem can be fixed by restarting the device. But not all problems can be solved by rebooting or resetting to factory settings.

We are not responsible for your actions. We recommend that you contact the service center for a solution to the problem.

Out of memory

When apps are downloaded from Play market, they are downloaded exclusively to the internal memory of the device. It will not work to select a memory card for downloading, you can only transfer the installed one in the future (and even then not every one). Cards are considered by the system as unreliable, because many problems can arise due to damage or failure. There is nothing you can do to ensure that applications are installed on the memory card by default. Therefore, the internal memory will have to be cleaned:

• uninstall apps you don't use;
• transfer music, photos and videos to a memory card;
• delete all unnecessary files, clean up temporary and garbage with a special utility;
• clear the cache of applications, first of all the Play Market.

Some applications (of those already installed!) can be transferred to a microSD card. To do this, you need to go to the "applications" tab in the settings menu and transfer them to an external drive manually. When the memory is freed and there is enough space to install a new application, you can try downloading again.

Viruses or firmware

If there is enough space, the cache is cleared, and applications are not installed on Android, the reason may lie in the infection of the device with viruses. If the antivirus is already installed, just run it and then fix the infected files or remove them completely. But the antivirus is also an application, if it is not worth it, you will have to install it manually.

Try downloading the apk from a trusted site and then installing it. If not, it is recommended to reset the system to factory settings. Problem not solved? It is worth contacting the specialists in the service center.

Also, the problem may be software failures associated with the firmware. Custom firmware sin with errors and the most unpredictable bugs. There's a good chance you've installed one. There is only one solution: flash the device to a stable official version that suits your device on the Android operating system.

Unstable Internet

It does not matter where applications are installed and how much free space is available if you have an unstable Internet connection that does not allow you to download even the easiest program. It's best to download and update everything on a stable Wi-Fi connection. Through 3G Internet, failures may occur due to disconnections. If you are seeing an "eternal" download bar, delay the download and installation until a normal connection.

How to install applications through the Play Market and directly

Most applications can be found in the Play Market. Go to the page you want, click on the "install" button. After that (with a stable Internet and the availability free space internal memory) the download will start. Direct installation starts only after you confirm it by setting the appropriate permissions for the application. Everything is simple and intuitive.

But what if the app you want isn't there? Or is it not available in your region? There is a need to learn how to install the application on Android directly, and not from the online store. Official developers often retain the ability to directly download the application from their website or blog. So Flash Player can be found on the Adobe website without looking for it in the Play Market. The main thing is to download applications only from trusted sources, ignoring dubious sites.

Find the application, download the .apk file to the device, then find it in memory. And just run. The program will ask for the necessary permissions, and then begin to install. In the same way as with the installation from the Play Store. Yes, the same apk file is downloaded from there. Just starting automatic installation after download. By downloading the application directly, you can install it at any time.

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Instead of the Clean Master application, you can use any other applications for cleaning and speeding up Android devices, including those combined with antivirus utilities.

I got an "Application not installed" error on Android - what to do? Most likely, it's time to deal with unused software. It clutters the internal memory and interferes with normal installation. As practice shows, errors occur even when there are less than 500-700 MB left. At the same time, many applications installed in the system are practically not used. Why keep them then? Feel free to demolish unnecessary applications and free up space.

You should also deal with the storage of music, photos and videos. If all this is stored in the built-in memory, you need to revise and transfer the files to a memory card or copy to your computer's hard drive. After removing the software and files, we launch Clean Master, clean up the garbage and proceed to re-install applications.

If your Android device showed the error "The application is not installed" and started to swear at the lack of memory, you need to remove some of the applications. Did you find anything unnecessary? Then move some of the applications to the memory card - this is done in regular ways and with the help of additional software. The performance of applications may decrease slightly, but there will be a place to install the necessary software.

Please note that some phones do not support installing and moving programs to memory cards or do not have card slots at all.

We still forgot about getting rid of errors - this is the most banal reboot. It will help get rid of simple errors in the functioning of the operating system and bring it back to normal. Every user can reboot Android devices - to do this, hold down the on / off button until the corresponding menu appears. Next, select the "Restart" item, wait for the reboot and proceed to reinstall the applications.

Virus infections can disrupt the functionality of the Android operating system. As a result of this, various errors may appear in it that interfere with the normal installation of applications. That's why it is very important to have at least the simplest antivirus on board- install it in advance, immediately after you have purchased a smartphone. After performing a thorough check for virus infections, you should proceed to reinstall the necessary applications.

If your device is damaged and clogged so much that cleaning and checking no longer helps, try performing a factory reset (Hard Reset). Be sure to back up important data to a secure medium beforehand.

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Unlike iOS and other closed systems, Android developers have provided the ability to install a variety of applications on their own, without the participation of the Google Play Store and other content stores. Having an .apk file on hand, you can install a paid application yourself, without paying a penny for it.

"Why resort to self-installation with .apk files?" - you ask, and then that not all applications are presented in Google Play Store and besides, most of them are paid and cost money. All Android applications have .apk extensions - in fact, this is a kind of archive, the contents of which can be viewed by any archiver.

Where to begin?

The first action that you need to perform is to allow the installation of applications from unknown sources, go to Settings/Settings -> Applications/Application Settings and check the box next to unknown sources/Unknown Sources and click OK.

1. Install applications using the file manager

After this simple step, you can copy the .apk file to your phone's SD card. Further, to install the application, you can use any file manager that recognizes and understands apk files. ASTRO File Manager or ES are suitable for these purposes File Explorer.

Launch the file manager, find the apk file, tap on it and install the application using the standard Android installer.

2. Install apps using the app manager

In addition, to simplify the procedure for installing applications for Android, there are special programs - application managers. One of these programs is

InstallAPK will automatically identify the apk file and start installing the application on your Android phone. You will only need to agree with the installation of the application and click the "Install" button.

4. Other ways to install Android apps

If you do not want to install any additional programs, then you can install the application from apk files in the old, old-fashioned way. Launch the standard Android browser and enter the following link in the address bar of the browser and the installation will start automatically:

content://com.android.htmlfileprovider/sdcard/Filename.apk

This method is not very convenient, and is suitable for those who rarely install Android programs.

Conclusion

In this article, we tried to describe all the ways we know how to install an Android application from apk files. If you know other ways to install programs - write to us about them in the comments and we will definitely include these methods in this article. Stay with us.

As you know, users often mobile devices encounter problems when installing a particular application / game. It would seem, what could be easier? But in practice, the standard installation of the necessary content can often turn into hours of torment. It is immediately worth noting that the problems, exactly and as well as the methods for solving them, depend on where the content was taken. Consider the main options.

Google Play and Error 406

Sometimes a situation happens that a user wants to download content of interest to him from the official Google store, but instead of the desired result, he receives an error 406. What should I do? Go to the "Settings" section, then "Applications" and select the "All" tab. For the items "Google Services Framework", "Google Play Market" and "Google Play Services" - follow these steps: uninstall updates, clear the cache, etc. If everything is done, then proceed to the Settings\Accounts\Google section. Here we are interested in the item "Setting up account synchronization". Remove all checkboxes and reboot the device. After the reboot, put all the checkmarks back (an error may pop up, but you should not pay attention to it). Reboot the device again. Ready!

apk file not installing

There may be several problems here. First, make sure you have root access. Without them, installing apk files turns into a real torment. Secondly, if during installation, you see a message that the format is not supported, then try using the "ROM Manager" application. Select the function "Fix permissions" and try again. Thirdly, make sure that in the Settings / Application Manager / Installing applications section there is a checkmark next to the item "Allow installation of applications from other sources". However, from now on, you should be completely sure of those sites where the necessary content will be taken from. And finally, fourthly, if nothing helps, then probably the reason may be in the firmware of the device itself. This is especially true for devices with unofficial firmware. In this case, it is recommended to consult a specialist.

If these tips did not help you and the application / game still does not install, then try asking a question in the comments on the relevant topic.

Installing applications on android is quite simple, in most cases you do not need to flash or patch your device in any way! To help novice users and not only, we present to your attention the manual "how to install games and programs on Android", as well as "how to install games with a cache on Android".

1. Getting started, the first thing you should do:

• Go to "Settings" - in the "Personal" section, select "Security" - in the "Device Administration" section, select "Unknown sources" tick!

! Note: android is one for everyone, but each manufacturer for some reason can change the placement of certain functions in the settings menu, so your task is to find something similar to "Unknown sources" and tick it!

2. Now let's move on to downloading the necessary files:

• There are installation files, also called apk and cache files, these are additional files for some games and programs! I will describe how to install all this below, first we will figure out how to select the appropriate files for your device.
• Near the links to download files, on our website, markers with various parameters are indicated, here is a list of them and what they mean:

First group:

• @root - applications that will work only on devices with super user rights, which can be obtained by flashing the device or through special programs.

Question: How to get Root rights?
Answer: We go to our info site in the catalog of smartphones and tablets, we find our device through the search, if there are firmware for it, then you will see the corresponding tab "Firmware" in it you will find instructions for obtaining root rights and instructions for firmware. For example: Samsung G9208 Galaxy S6 firmware instructions

• Adreno, PowerVR, Mali, Tegra 2, Tegra 3 - in addition to the main processor, the devices also have a graphics processor - a video accelerator. You need to select files in accordance with the video accelerator of your device (we mainly use these designations for cache files), but if there are all marks next to the link to the cache, then there is one cache for everyone!
• For Broadcom processors - try cache from Adreno
• For Vivante processors - the cache from Mali should be suitable

2.1 Determine the type of processors in your device:

• After registering on the site, go to "Cabinet" - "Settings", then we find the field with the note "Your PDA device" and start entering the name of the smartphone / tablet (similar devices will be displayed in the list), after selecting your device, its video accelerator and architecture will be displayed below processor. Or use CPU-Z
• If your device is not in the list, use the "My device is not in the list" button and we will add it!
• Having decided which tags correspond to your device, go to the site and upload files!

3. Installing apk on android:

• If the files were downloaded to the PC, we connect the device with USB help cord, wait until the device is recognized as a flash drive (for some, you may need to confirm the connection on the device). Next, copy the downloaded file to a folder convenient for you.
• If you downloaded the file directly to the device, then skip the previous paragraph.
• Next, we launch the file manager (called "My Files" on Samsung), if it is not there, install it from the Play Store, for example: "ES Explorer".
• We find the downloaded file and tap on it, launching the installation, follow the instructions, at the end we click ready!
• If the game does not require additional cache files, then in the list of your applications we find the game and launch it!

3.1 Installing games with cache on android:

• We select the previously downloaded cache, unpack it using WinRAR for PC or ES File Explorer for Android, or their analogues. The resulting folder is placed along the path indicated on the page with the game (above the links with the cache). In 99% of cases, sdcard = BUILT-IN memory card, NOT removable microSD!
• Next, install the apk, as described above.

Note: cache path specifics:

• /sdcard/Android/data/ and /sdcard/gameloft/games/ - caches located on these paths can be downloaded through the application via wi-fi, EDGE or 3G. Also, it is not necessary to change the cache from version to version.
• /sdcard/Android/obb/ - download caches to this folder only from the site, when updating the version, download the new cache again.

4. Major Errors and FAQs:

You will not receive an answer to these questions from the moderator, you will find the answers to them under the list of questions!

1. In the description of the cache path, "sdcard" is a built-in memory card, NOT a micro SD that can be removed!
2. Will it work on my device?
3. Which cache to download for my device?
4. I don't have a data or obb folder, what should I do? Create it!
5. Why does not see the cache?
6. I placed the cache correctly, but it asks me to download XXX MB, why?
7. I have little built-in memory, and the cache weighs a lot, what should I do?
8. How to ask a question in order to get an answer?
9. How to get Root rights?

Question: Will it work on my device?
Answer: Look at the tags and whether your device is supported on Google Play or not. We cannot know whether it will work for you or not, and it can take a long time to wait for a response from a user with the same device! Please post the result!

Question: Why does not see the cache ?, I posted everything as written.
Answer: The cache is located not on the built-in memory of the phone, but on microSD. Not every game supports placing the cache on an external drive. The exceptions are some Chinese devices and some Fly models, in these smartphones / tablets, when a microSD card is connected, the external card is replaced with the built-in one ...
Answer 2: Run the game and see what folder and where it will create, should be similar to the folder from the cache archive, move the files from the folder in the archive to the folder created by the game.
Answer 3: The folder from the archive must be extracted to the current folder, and not to the folder with the name of the archive (when unpacking via WinRAR)

Question: I placed the cache correctly, but it asks me to download x MB, why?
Answer: If the number of MB is approximately equal to the MB of cache downloaded from the site, then this is not a download, but a full download! That is, the cache is not located correctly, read the previous question / answer!

Question: I have only 1GB of internal memory, and the cache weighs 2GB, what should I do?
Answer: Flash root rights and use the program, for example: Directory Bind.
Answer 2: Look in the phone settings, the option "Install applications on an external SD card" activate it. It may help if the apk has already been installed, after enabling this option it needs to be reinstalled.

Question: How to ask a question in order to get an answer?
Answer: Write in clear text, without using words from only capital letters, your installation steps: Indicate which card the cache was placed on (external microSD or built-in), write what full cache path you got, whether there is Internet on the device and the actual model device (it is NOT necessary to specify its characteristics). Have you checked whether your device is supported by the game on the Google Play page!

In this article, I will tell you about the ten most common reasons why programs do not install. You will learn about the symptoms of a particular cause and be able to diagnose and eliminate it yourself.

So, let's go - a dozen reasons why programs on Windows are not installed.

The most common reason why programs are not installed is the lack of the required version of the NET Framework system library. This library contains resources that are needed for the normal operation of a particular program. Therefore, if it is not there, then the program will not be able to install.

It is recommended that you install all versions of the NET Framework on your computer, starting with 2.0 and ending with the oldest version that your Windows supports. This will ensure the normal operation of all programs compatible with your OS.

To find out which version of the NET Framework is installed on your computer, click on the "Start" button, select "Control Panel", then open the "Programs" section, and then "Programs and Features" (example for Windows 7).

You can download the versions that you are missing on the Microsoft website, .

As a rule, if programs are not installed due to the lack of the required NET Framework, a message appears indicating the version that needs to be downloaded.

Lack of Visual C++ and Direct X required version

The next common reason why programs fail to install is the lack of Visual C++ and Direct X components. Visual C++ is required for programs that are written in the popular C++ language, and Direct X is required for most games. As with the NET Framework, there are different versions of these components.

You can find out the version of Visual C ++ in the same way as you can find the NET Framework - in the "Programs and Features" section.

And in order to find out the version of Direct X, click "Start" and open "Run" (or ctrl + R). Write down the dxdiag command and click OK.

As a rule, if the program is not installed due to the absence of these components or their correct version, a corresponding message appears. The required versions of Visual C++ can be downloaded, while Direct X .

Incorrect bitness of Windows

Windows can be 32 or 64 bit. On 64-bit operating systems, you can install 32-bit and 64-bit programs. And on 32-bit systems, only a 32-bit program will work. Therefore, you will not be able to install a 64-bit program on it.

To determine the bitness of the system, right-click on "Computer" and select "Properties".

The capacity of the program can be found in its description. If it does not fit, then an appropriate error will appear during the installation process.

Corrupted installation file

If during the installation of the program an error occurs that the installation file is damaged, then you should get this file again. This can happen due to the fact that the program file has not been completely downloaded, or has been posted on the site already damaged. To solve the problem, you need to try to download the program installation file from another location.

Missing Required DLL

A rare reason why programs are not installed is the absence of some libraries in the system that should have been in it by default. This happens if you are using an unofficial build of Windows or if these libraries were intentionally removed.

The problem manifests itself in a message that swears at some DLL file.

To solve it, you need to download the required DLL file and place it in the correct directory (in system32 or SysWOW64). You can download libraries.

After that, you should register the library. To do this, click "Start" and select "Run" (or keys ctrl + R). Then write cmd and click OK. Libraries are registered on the command line with the regsvr32 file.dll command, where file.dll is the name of the library file.

Software build curves

A common reason why programs are not installed is the crooked hands of pirates who hack them and give them to you for free, or somehow modify them, that is, make their own assembly (repack). To avoid this, check out the comments of those who have already tried what you are installing.

It is difficult to say what errors can be when installing such programs. It could be anything.

Without administrator rights

If you work in an office, then you may find that your user does not have administrator rights. Your system administrator may have deliberately prevented the installation of programs. To resolve this, contact him for help.

This can happen not only in the office, but also at home if your user on the PC does not have administrator rights.

Blocking by security programs

All computers have antiviruses and some software can be blocked by them. This is also a common reason why programs are not installed. Solving it is simple - disable your antivirus or other security program and install the program. If necessary, add this software to the trusted list in the antivirus or security program.

Be carefull. If you are not sure about the reliability of the source of the program, then it is better not to install it if the antivirus swears.

Conflicts with incompletely removed old versions of programs

If you are updating a version of the program, and first uninstalled the old one, and then try to install the new one, then a conflict may occur if the components of the old version were not completely removed. This often happens when using the standard Windows uninstaller.

To fix this issue, you must uninstall all components of the previous version manually. You can also use cleaner programs such as CCLeaner.

Hardware deficiencies

Today there are such programs and games that can no longer be installed on all computers. So they can make special demands on video cards, random access memory, processor.

To solve such a problem by downloading some files will not work. Here you need to upgrade your computer and buy more hardware.

In order to simplify the installation of new programs on your computer, you can use the OfflineInstaller website ( 6 ratings, average: 3,67 out of 5)

To fully use a gadget with Android OS, you need to install a variety of applications on it that will help you comfortably watch videos, process photos, communicate on social networks, etc.

Usually everything goes fine, but sometimes it is not possible to install a game or application. Why is this happening?

Most common cause: random failure

Any technique is not immune from accidental failure. If the installation failed for the first time, most likely this is an accidental malfunction. Just turn off the phone (tablet), and then turn it back on, i.e. reboot your device.

As a rule, this is enough for everything to work fine the next time you start the installation.

Out of memory

Downloading applications on Android devices always occurs only in, and not on the memory card. After installation, some of them can be copied to the card, but not all. If your device's own memory is full, or the app you're downloading is taking up a lot of storage space, you'll need to free up space for it to install.

1. Check the free internal memory of your tablet or smartphone.
2. View the list of installed applications, remove those that you no longer use.
3. Transfer files to the memory card for which Android allows this action. Usually these are photos, video and audio files, texts, etc.
4. Run the program to clean up memory from garbage - temporary files left after the work of applications. If cleaning has not been carried out for a long time, then a sufficiently large amount of memory can be freed after it.

After completing all these operations, try downloading the application you need again. If there is a lot of free space, then it should install without problems.

Unlicensed or incorrect application

Check the source from where you want to install the app. Many gadgets today are used with the installation of antivirus programs and other security systems. If the application being installed is incompatible with the official version of the Android OS or contains viruses, it will not be installed. The Android OS developer recommends using only applications from the Play Market for installation, since he can guarantee their safe and correct operation.

If you still want to install the application from another source, go to the security settings and allow the installation of third-party software. It is possible that in this case it will be downloaded to the memory of your Android device as a file, and then you will have to run it with a special installer. But in this case, no one can guarantee that it will work correctly on your device and will not conflict with other applications.

Reset

In the case when all of the above did not help, or if, after various attempts to change the settings, Android almost stopped working altogether, the last resort remains - resetting the settings to the original ones. Before starting a factory reset, remove the memory card and try to save your contact list and other important information on your desktop computer .;