I had Morrowind installed on my PC with 64 bit Windows 7, and deleted it to start a new game. When I load it the disc drive revs up, but nothing else happens. I don't even get the install window, which I do get when I want to reinstall both Tribunal and Blood Moon. I read in another forum that the problem could be either the disc drive or the disc itself, but all other games work fine. What's up with that?