Quote Originally Posted by RDesikan View Post
Yeah it's Avast. You are supposed to hard reset the device after map installs yes?
If you're running Win7 use Microsoft Essentials, Win8> use Defender. They're freely available without charge for genuine MS Operating Systems and they won't give false positives.

I've never reset after solely doing a map update. I always reset or clear nonvol before and after firmware changes though. As Strephon Alkhalikoi said, it can't hurt. Back up your favourites first if you want to restore them.