Go to Control Panel > Programs > avast! Antivirus > Tap twice and a new window will appear > Scroll down and select “Repair” option > Reboot and see if the problem resolves.
I logged in as Admnistrator and did that procedure. It literally took two seconds, so I was suspicious that anything happened. Windows also gave me a message saying that the program might not have installed properly.
I restarted the computer and the Real Time Shields were on.
I am concerned that I discovered this by accident; the Avast Icon was hidden from view by Windows 7 even though it had this important message. The system may have compromised for days. There should be a better warning system.