I suspect installing Nero caused this problem, so I'm checking here to see if anyone has an answer: This problem occurred a couple weeks after upgrading to Vista. At some point I tried installing Nero Express 6. When I open my CD drive or my DVD drive and insert a new disc, like a game, Windows doesn't recognize that I've done so. The autorun doesn't run. In my computer, it still shows the title of the last disc that was in there. And when I doubleclick the drive I get an error. The only way to run anything is to "explore" the disc and open the program.