MS WindowsXP Pro the best in windows

Windows 3.1

I remember all the fun times I had as a young one with it.

i have used xp but i have serveral computers that cant handle xp, and windows 2000 provides a system with less resource use, but wiht the capabilities of windows xp. Hands down win 2000 pro

If i have to say about my favourite OS then it is Windows Xp without any service packs coz it is really fast and easy to use compare to other OS. Easy to format and Install whereas in linux u are supposed to collect all the harware details before installing

My favorite has to be Windows 2000 Professional. Even on a P4 It's less of
a "Memory Hog" than XP or Vista. Not to mention it still has great support for old programs.