My toolbar icon says “not protected”, and I can’t access the virus scan function of my Avast program. I keep getting a “UI not available” message, so I can’t perform a virus scan. Any one else?
Unlikely to have been hacked, more likely a program problem.
Try the Avast Repair function:
Control Panel - Programs > Uninstall A Program > select the Avast Antivirus > Uninstall (it doesn’t uninstall immediately) - from the next screen there should be an option to Repair. On completion restart the system (complete shutdown followed by a Start).
Use the Restart function. Not the shut down and then start your computer again.
https://screencast-o-matic.com/screenshots/u/Lh/1587931304803-34366.png