does the drive normally read the original disc correctly? as bradybnmci indicated, try refreshing the view once the new disc is in the dirve: from My Computer, click View --> Refresh. also, when you put the new disc in the drive, does it spin like the computer is trying to read it, or is it silent? finally, do you notice that other operations on your computer take a long time to complete, or is this the only unusual behavior you have noticed from your system?