I use windows 8 on steam. Only because I had vista and it was horrible, and windows 8 had equivalent performance as windows 7 but only cost me 40 bucks to upgrade. Actually really enjoying it, runs alot like windows 7, sept my PC boot's up in about 5 seconds now, vs a whooping minute and change with vista (also upgraded to a SSD) Not as radical as everybody made it out to be. Just a different start page, but there are options out there to make it just like windows 7. (not sure why you would upgrade from windows 7 if you had the choice) Def recommend this OS for people buying new PC's.