It sounds like you may not have the codecs for playing DVDs, maybe they were hosed with the update. If you still have the discs that came with the drives try reinstalling WinDVD, or Intervideo, or whatever player came with them. There are also some OpenSource solutions, try starting here: http://www.opensourcewindows.org/ or try http://softpedia.com to see about a DVD player. Windows Media Player, although it sets itself up as the default DVD player, is incapable of playing DVDs of there are no codecs for it installed on the system. Hope this info helps.