Hmm... I've been running Win 8 and now Win 8.1 with no issues with Skyrim or any other game that I play on my machine. As for Skyrim, I'm using Mod Organizer and several other utilities from within Mod Organizer. I have had the occasional crashing of Skyrim, but these have been attributed to mod conflicts. I just find out what mod(s) that are causing the game to crash and then delete it. Skyrim runs well again. Therefore, I personally don't see any problems as it pertains to the OS with my games. Been running Win 8/Win 8.1 on my gaming rig since I first built it February of last year.