From your keyboard, press the Win key and R key at the same time to run the Windows Services and type services.Esc, and hit the OK.
In the Services box, find and right-click AVG Antivirus, then choose Properties.
Make sure the General tab is carefully chosen, then tap the drop-down menu next to Startup type and choose Automatic. Press Apply to confirm changes. If the service stops in a row, click Start in the Service status section. Restart your device and open AVG Internet Security or AVG AntiVirus FREE again.
If you still see the error message, consider calling AVG support.