I have an old Dell p4 sx260, 2.53 that runs XP upgraded to Windows 7 and also runs Ubuntu. While in Ubuntu, the ps2 trackball, usb mouse and printer all work with no problems. In XP/7 the usb mouse and printer will not work. I have tried the normal "fixes" found on the internet and none work. This computer was in a large dlan one time. I just removed the logon request.
Also since I've loaded Windows 7 onto XP, I am stuck with windowsxlive becoming one of my homepages every time I restart. It's a nuisance.