im running vista extreme black edition (back up version as my legit one died a death a few months ago thanks to antivirus 2007 .it deleted all my back ups and turned off my system restore as well as getting rid of some system files i needed) so ive got an active desktop that can run anything avi or mpeg as my background.....was using the shark swimming in a pool but got boreed with that and now using this for a while..