well i am also unable to run the T2 dvd . My sys config: P3 (Compaq presario 5000 M), 128 MB ram , 60 gb hdd , win xp professional witn no service pack , Cd rom + dvd rom . When i try to open the dvd in my computer it says : Please insert a disc => Its not being recognized In the device manager it shows the drive as a dvd drive. When i tried another video dvd same happened . They work fine on my friends pc.Also i am able to run the dvds(software) that come along digit . I have formatted my system once so i suppose theres somethig missing . In the When i run DVDUPGRD /DETECT : it shows 2 codescs installed : mpeg16.dll and clvsd.ax . I have installed windvd and compaq dvd player but still there is the same prob.