I tried to play Dvd's and CD's in my computer.. some work just fine but some just won't play or load at all.. the latest CD i tried was "left 4 dead" It was a game i just bought.. I tried inserting the disk but then it wouldn't load.. when i go to "my computer" the Drive D is blank.. when I try to right-click it and click explore, It's empty.. I tried my Cd of "battle realms" and my computer read it right away.. I just don't know what to do anymore.. Can somebody pls help? =)