I bought the upgrade version of XP PRO and it upgraded right on top of XP Home (OEM Version that came with a new computer). I thought I was going to have issues since I had heard so many horror stories 'bout XPHome to XPPro. But the upgrade was smooth. -eLindy
You can get Pro for $145 or there abouts -- check the price comparison sites: www.pricegrabber.com www.dealtime.com or straight to www.newegg.com DB