If the assigned Avira password is required for a product renewal or an update installation but has been forgotten, you'll need to remove the password protection first to continue with the product renewal or update installation.
Therefore, you have to start the computer in Safe Mode and perform changes in a certain Avira file.
To remove the password protection you have to edit the file AVWIN.INI.
1. Go to C:\ProgramData\Avira\Antivirus\CONFIG.
2. Right-click on the AVWIN.INI file and open it with the Editor.
3. Edit the file under the entry [COMMON]
4. Save and close the file.
5. Restart your PC.