I have a Mat****a-dvd-ram-uj-840s in my Qosmio Laptop. I had upgraded from xp to Vista 32. I never had problems reading/writing with my DVD. Now it sometimes does not recognize if there is a file on the DVD or CD RAM... it also no longer writes DVD or CDRAM correctly. I think this may be due to a virus i recently had. Are there any fixes you can recommend? I do see the drive in My Computer. thank