Personaly I have 1Gig of ram w/ XP pro and I disabled the page file and haven't had issues for over a year + I normaly run 24/7 w/ the only reboots due to power outages or software updates. I also noticed a small improvment over having even an optimised swap file, NT os's will use VM even if you have enough physical ram because of the way they are written and the only way to prevent that is to disable the swap file, If it does turn out you need a swap file, windows will tell you and you can always add it again later, for ex. when I open large pictures in photo shop, I've had to re-enable the page file because it won't fit in physical ram, but other than for photo shop I haven't needed or wanted a swap file. and my system feels snappeir w/out a swap file IMHO. Hope this helps....