Why does my Avira Antivirus no longer update manually nor automatically?

On rare occasions, Avira Antivirus may no longer update manually nor automatically. This is caused by the RebootPending.txt file which remains permanently in the installation directory of Avira Antivirus even after a computer restart.

As a result, the computer expects a further restart following a reboot and so blocks automatic and manual updates of Avira Antivirus.

Manual deletion of the RebootPending.txt file allows regular automatic and manual updating of the Avira product again.

1. Open the Avira console via the Avira icon in the taskbar.
2. Click the Settings icon in the lower-left corner of the Antivirus user interface.
3. Click General → Security.
4. Disable the option Protect files and registry entries from manipulation.
   
   
5. Confirm the change by clicking Apply and OK.
   
   
6. Delete the RebootPending.txt file from the following Avira Directory:
   • Windows 7:C:\ProgramData\Avira\AntiVir Desktop\CONFIG\RebootPending.txt
   • Windows 8/8.1:C:\ProgramData\Avira\Antivirus\CONFIG\RebootPending.txt
   • Windows 10:C:\ProgramData\Avira\Antivirus\CONFIG\RebootPending.txt
   
   

   Note
   If the "Application Data" or "ProgramData" folder is not visible, activate the option “Show hidden files, folders and drives” in File explorer.
   For more information, read this article.

7. Go back to Settings → General → Security and re-enable the option “Protect files and registry entries from manipulation”.
8. Confirm the change by clicking Apply and OK.
9. Update your Antivirus product.