i use windows xp on 4 computers, windows 7 on one and windows vista on 2. i honestly have to say that windows xp was the best for its performance.
the computers with xp are perfect with xp on them, but with an upgrade to windows 7 they lag.
wasnt windows 7 meant to be faster than all previous versions of windows? hrmm.... im not gonna believa anything microsoft says again :/