I've been using XP Pro at home and at work for over a year. I've had far fewer software issues at work with XP than I did with 2K. I've had NO hardware or software issues at home and that includes running some older games such as the first Heroes of Might & Magic, Blade Runner, Lands of Lore 2, Wing Commander: Prophecy, and Ultima VI, VII, and VIII. I haven't attached an add-in card or a peripheral yet that XP didn't run properly from the word go.