you only have to find the firmware of the DVD and run it. Make sure when you run the firmware all program are closed and disable your Antivirus. This is what I have tested today and it worked. Hope you all get the same results.
Well I had a problem similiar and maybe my advice can help you. First of all here is the problem I had. I have a DVD-RAM drive. It couldnt read DVD Videos or DVD Games. It could however read regular CD's. After a bit of frustration I talked to one of my buddies and found that he said it was a problem with the laser reading your DVD's. He told me to get a lens cleaner CD. I didnt have one so I went to my bathroom grabbed a cue tip and some rubbing alcohol and dipped the cue tip in it. I dabbed it a bit so it wasnt soaking wet with the alcohol. I then opened my dvd ram drive's trap and rubbed the laser lens with the cue tip. I inserted the dvd disk and it worked. All you need is a cue tip and rubbing alcohol and you win. I hope this helped.
Maybe I read the posts too quick & someone has already suggested simply uninstalling the player (double-click on it in device manager) & then re-installing (does it almost automatically if you click on "add new hardware" in control panel).
Maybe try it before throwing the player away or opening it up? (and it's a good idea to use canned air for cleaning electrical & optical components - it's cheap enough at PC stores)