If you want to uninstall Avira Antivirus Security but it’s not possible, you may have enabled the Device Administrator.

To disable the Device Administrator, please proceed as follows:

1. Start the Avira Antivirus Security app
2. In the menu go to Settings → Device Administrator in the top left corner
3. Click on Disable
4. Try to uninstall the application from your device again

Alternative way

There is an alternative way, if you have problems to start the Avira Antivirus Security App and therefore cannot deactivate Device Administrator.

Note:
The following approach can be different from device to device.

1. Go to Settings → Security
2. Tip the menu item Device administrators
3. Select Avira
4. Click Deactivate
5. Try to uninstall the application from your device again