'problem with disc.. may be dirty or scratched'???

[Quall999]

It's probably the game. I mean, because it's a backup. This ussually happens to specific games though.

For example, 007:Agent Under Fire will give you this message 80% of the time (for almost evertone I've talked to). No matter what media to use, that message appears. Much like Halo's glitch when you try to play multiplayer.

I'm not saying that that is your problem, but some games it always happens, no matter what methods are used.