a PM 2.0 GHZ and 2 gig of ram and 100 gig hd and it still performs well. I removed XP in June 2006 and have used Vista soley on that machine and it still performs well. I don't use it as much because I bought a Core 2 Duo but it's got a 20" screen and I take my PM when I travel. One thing is if you want to stay with XP I would upgrade your current system and when you absolutely need to go to Vista just get a new machine.