I’ve had Avast Home running smoothly for quite awhile now. However, something happened to my system while installing a DVD+/-RW drive and my system clock was set to 2018. After fixing this, I realized that Avast wouldn’t let me update. Every time I try to update, it says “The license key for this product is invalid or expired.” (Under About Avast! it says that I have updated until October 1, 2005.) I’ve tried getting a new license key as well as uninstalling and reinstalling. Nothing seems to work.
What happened was this. When you computer clock was reset to 2018, the “date coding” inside Avast told the program that the time limit for its’ use had expired.
Doing it now, thanks. Of course, I doubt it was a worm as it would have had to have gotten past my router, firewall, and Avast. And if it survived the reboot, it would have had to have gotten past Startup Monitor as well. Still, it doesn’t hurt to check.