after I upgraded PC specs, I had problems with XP, but I was a die hard user of XP made my custom installs exact the way I wanted with 7 I couldn't do so much except making it little lighter but overall 7 aint that bad if you remove some things like IE, WMP, .net 3.5 (too bad 2 cant be removed), useless indexing service, tweak WinSxS to minimum but on piece of crap like vista and 8 i wouldn't go dead