I'm not near this PC. The Avast Pop-up prompts to "Re-Register" (actual Avast text). You tell me.
This was after registering because my annual license was about to expire, which updated to ver 7 and loaded Chrome (I will load Chrome if I want it [sounds like something a virus would do] ), then the sandbox issues, which I turned off after it tried to sandbox "Excel" and "Explorer". Boot up the next morning and it locks up. Forced shut-down. Reboot- and later Avast pop-up -> "Re-Register". My OS version and Excel version are in previous replies.