I was using windows 8 with bf3 and loved it until I updated the drivers about 1.5 months ago and got that dreaded memory leak that maxed out my 16 gigs of system ram. I wanted the beta to be as stable as possible so I loaded windows 64 pro and have struggled through the beta. From what I read bf4 will be optimized for windows 8 and AMD, I have a 6970 2gig card. So I'm torn, but will probably try win 8.1 with latest drivers on release then judge from there.