I have an HL-DT-ST RW/DVD GCC-4243N in my wifes Dell PC and it will not read copied disks of any kind. I can put it in my PC DVD burner or dvd player and it shows all the files... even auto opens. Again, same disk in the Dell DVD and it shows that its blank. Any one have an idea of why its doing this? Drivers perhaps? Thanks a bunch for your assistance.