XP Pro does have product activation!
Originally posted by Rewandythal
XP Pro does NOT use product activation... I have XP Pro and It's the most stable NT based Windows I've ever used. 2K is almost as stable, but I'd still recommend upgrading to XP... It's the best MS operating System based on NT that exists... Windows 98SE is another good option, and has more support & compatibility, but nothing wrong with XP, as long as your computer's up to it.
However, unless there is something specifically tying you to a Windows platform, I suggest trying Linux.
By the way - XP pro does support FAT32 AND NTFS but NTFS makes it more stable & secure (cos XP is based on NT anyway)