Same thing happened with AVG, and then Avast. Fortunately Microsoft Security Essentials came out about the same time every other simple AV became a bloated mess.
The problem now is that MSE doesn't seem to keep up with the latest viruses and hacks. My kids wrecked our Windows 7 computer twice by trying to download Minecraft addons. (First time it installed an ad-bot that was running hidden Firefox windows in the background and swamping our internet connection by loading pages and clicking ads. Second time it was a rootkit that added it's own "recovery" partition to the drive; which it used to reinfect the computer even after I wiped and reinstalled Windows 7.)
Now we have Windows 10 and they all have their own non-admin accounts, so hopefully they can't install anything super destructive.
The problem now is that MSE doesn't seem to keep up with the latest viruses and hacks. My kids wrecked our Windows 7 computer twice by trying to download Minecraft addons. (First time it installed an ad-bot that was running hidden Firefox windows in the background and swamping our internet connection by loading pages and clicking ads. Second time it was a rootkit that added it's own "recovery" partition to the drive; which it used to reinfect the computer even after I wiped and reinstalled Windows 7.)
Now we have Windows 10 and they all have their own non-admin accounts, so hopefully they can't install anything super destructive.