I am using XP and have a DVD-RW/CDRW drive and it is having problems. It will read and play a DVD, it will read and play an audio CD, it will also start up a program CD and it will play a CD-ROM game. It will not read a Photo Disc (both those that are produced commercially by Kodak, and a disc that I have previously burned in the same drive). It appears to be trying to read the disc, but it just can not. I also go to "explore" and click on the drive and it does not recognize the files. In addition I have tried to burn an audio disc (using XP and Nero) and I can "rip" the music, but when I put a blank disc in it does not recognize the disc. Is this a hardware or software problem?