v2.0 NOT for windows 2000 ? in Defraggler Posted November 29, 2010 Defraggler had supported Windows 2000 in the past so it seems hard to believe that there is now a compatibility issue using the defragging API. It seems more likely to be problem with an add-on library used for Defraggler which doesn't support Windows 2000. Until one of the coders would care to speak up it's still unclear whether dropping Windows 2000 was intentional or not. Richard S. I think dropping windows 2000 IS INTENTIONAL. A lot of defragmenters with boot time defrag still work on w2k(Raxco PerfectDisk, Ultradefrag, o&o). They must use the new VisualStudio wich actually drop w2k support. @ Nergal Win2K is an insecure OS and really should not be used any more. Most software has dropped support for it (Zone Alarm sticks in my mind) Please speak for yourself. Personally I consider w2k more mature, less resources hungry and bundled with less garbages than XP, Vista or 7. Just the stuff you need to work with some garbage around.