My drive won't play rented dvds

You probably don't have the proper codecs needed to play the DVD's. Would suggest you download more codec files for dvd's. This should solve your problem. Also, you need to have a DVD drive as DVD's won't play in a CD drive. Also, you need to have a DVD player as well. Or you could download the Windows Media Player version 11. This would have the necessary video codecs and the DVD player - but you will still need the DVD drive in order to play your DVD's.