my ap teacher was talking to me about how he wanted Windows XP. but he has windows vista on his new labtop, i was wondering if you can removie windows vista and install windows xp without hurting or messing up your computer? i helped my friend, but it her computer was old, so it crashed. but she fixed it and it has xp, with some flaws. anywho, any ideas?

I know you can downgrade from Vista to XP. Link here.

thanksss :] i'll send that link to him.