Installing Android applications both from the Play Store, and in the form of a simple APK file downloaded from somewhere, can be blocked, and depending on the specific scenario, various reasons and messages are possible: that the installation of the application is blocked by the administrator, about blocking the installation of applications from unknown sources, the information from which indicates that the action is prohibited or that the application was blocked by Play Protection.
In this instruction, we will consider all possible cases of blocking the installation of applications on an Android phone or tablet, how to fix the situation and install the desired APK file or something from the Play Store.
- For security reasons, application installation from unknown sources is blocked on the device
- Application installation blocked by administrator
- The action is prohibited. The function is disabled. Contact your administrator.
- Blocked by Play Protection
Allow installing applications from unknown sources on Android
The situation with the blocked installation of applications from unknown sources on Android devices is perhaps the easiest to fix. If during installation you see the message “For security reasons, your phone blocks the installation of applications from unknown sources” or “For security reasons, the installation of applications from unknown sources is blocked on the device”, this is exactly the case.
Such a message appears if you are downloading the APK file of the application not from official stores, but from some sites or if you receive it from someone. The solution is very simple (item names may vary slightly on different versions of Android OS and manufacturers' launchers, but the logic is the same):
- In the window that appears with a message about blocking, click "Settings", or go to Settings - Security yourself.
- In the "Unknown sources" option, enable the ability to install applications from unknown sources.
- If Android 9 Pie is installed on your phone, the path may look slightly different, for example, on a Samsung Galaxy with the latest version of the system: Settings - Biometrics and Security - Installing unknown applications.
- And then permission to install unknowns is given for specific applications: for example, if you run the installation of the APK from a specific file manager, then permission must be given to him. If immediately after downloading by the browser - for this browser.
After performing these simple steps, it is enough to simply restart the application installation: this time, no messages about blocking should appear.
Installation of the application is blocked by the administrator on Android
In case you see a message that the installation is blocked by the administrator, this is not about any administrator person: on Android, this means an application that has especially high rights in the system, among which may be:
- Built-in Google tools (for example, the Find My Phone tool).
- Parental controls.
- Sometimes they are malicious applications.
In the first two cases, fixing the problem and unlocking the installation is usually simple. The last two are more complicated. A simple method consists of the following steps:
- Go to Settings - Security - Administrators. On Samsung with Android 9 Pie - Settings - Biometrics and Security - Other Security Settings - Device Admins.
- Look at the list of device administrators and try to determine what exactly can interfere with the installation. By default, the list of administrators may include “Find a device”, “Google Pay”, as well as branded applications of the manufacturer of the phone or tablet. If you see something else: an antivirus, an unknown application, then maybe they are the ones that block the installation.
- In the case of anti-virus programs, it is better to use their settings to unlock the installation, for other unknown administrators - click on such a device administrator and, if we are lucky and the option “Deactivate device administrator” or “Turn off” is active, click on this item. Attention: the screenshot is just an example, you do not need to disable “Find device”.
- After shutting down all dubious administrators, try reinstalling the application.
A more complex scenario: you see an Android administrator who blocks the installation of the application, but the function to disable it is not available, in this case:
- If this is anti-virus or other security software, and you cannot solve the problem using the settings, just delete it.
- If this is a means of parental control, you should apply for permission and change the settings to the person who installed it; it is not always possible to disable it yourself without consequences.
- In a situation where the blocking is presumably done by a malicious application: try deleting it, and if that fails, then restart Android in safe mode , then try disabling the administrator and uninstalling the application (or in the reverse order).
The action is prohibited, the function is disabled, contact the administrator when installing the application
For a situation where when you install the APK file, you see a message stating that the action is prohibited and the function is disabled, most likely it’s a matter of parental controls, for example, Google Family Link .
If you know that parental control is installed on your smartphone, contact the person who installed it to unlock the installation of applications. However, in some cases, the same message may appear in those scenarios that were described in the section above: if there is no parental control, and you receive the message in question that the action is prohibited, try to go through all the steps to disable the device administrators.
Blocked by Play Protection
The message “Blocked by Play Protection” when installing the application informs us that the built-in Google Android function for protection against viruses and malware considered this APK file to be dangerous. If we are talking about some kind of application (game, useful program), I would take the warning seriously.
If this is something initially potentially dangerous (for example, a means of obtaining root access) and you recognize the risk, you can disable the lock.
Possible actions for installation, despite the warning:
- Click "Details" in the blocking message box, and then - "Install anyway."
- You can permanently unlock the “Play Protection” lock - go to Settings - Google - Security - Google Play Protection.
- In the Google Play Protection window, disable the "Check security threats" option.
After these actions, blocking by this service will not occur.
I hope that the instruction helped to understand the possible reasons for blocking applications, and you will be careful: not everything that you download is safe and it is not always really worth installing.