Hi freinds i am back with some more questions. freind i want to really know that does windows recognize all video formats cause yesterday when i brought on rent from movie gallery (harry potter and the prizoner of azkaban a copied copy of the original cd )to see on my computer and when i clicked to open the disk windows displayed an error saying corrupted cd or windows cannot recognize the format . i played it on my both os win xp and win 98se and in all applications including wmp9,jet audio 6.5 pro,power dvd 4.0, but none was ready to open it, atl lat i gave up playing on my pc and shifted to my dvd player and too my suprise it played up ther . icould not belive it and the video quality was crystal clear there was no problem while playing the cd on my dvd player. i assure u there is no problem with my cd rom because it was able to play the pirated copy of veer zaara quiet well and now i want to know that was there any software on that cd that disabled it from playing on my pc .is there any audio video format that this film used that windows cant recognize. does window dont have this format.is there any war or any software thatt i can get to enable the playing of that cd. or it was just bcause of the pirated copy. please send me ur suggestions quickly as posssible. thank u all.