Ok, so I'm trying to fix a freinds machine. We bought her an Artec DVD player but when we try to play any DVD in either WinDVD or PowerDVD it give us either a "No Valid Drive/Disc Found" or an "Unsupported format" error. The two programs weren't installed at the same time, I uninstalled PowerDVD and installed WinDVD and neither worked. Also, when I go to my computer when there's no disk in the drive it reads as a "CD Drive" not a DVD drive. When I explore the drive with a DVD in it all that it shows on it is an audio file. I thought perhaps the drive was faulty so I removed it and installed my working DVD player that I'd been using on my system on hers and it had the exact same problems. I also tried moving all the non-digitally signed drivers the dvd player was using into a temp folder to see if they were causing the problem (I rebooted after the move too). Didn't work. I tried installing and uninstalling the drives. I got all of the possible windows updates. I'm clueless. Does anyone know what might be wrong or what I can do to make it work?