My DVD drive is working fine a few weeks ago but now it is unable o read DVDs. I'm not sure if the drive itself is busted but it can still read CDs.
I did not make any major changes on my PC. I can't figure out what went wrong. When a DVD is inserted into the drive, windows explorer displays undefined on the drive letter. I even upgraded it to firmware DS0F but that did not fix the problem instead it only restored the regional protection code.