Hi rc flyer :slight_smile:

Did you try a clean install :

Download the Avast! Uninstall Utility to your desktop.
Download Avast! Pro

Disconnect from the internet.
Uninstall Avast! via control panel.

Run the Uninstall Utility and accept the reboot to safe mode.
Once complete reboot your system.
Reinstall Avast!

Greetz, Red.