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.



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