Drive can't read DVD

Jeff - If you have not changed your software configuration in any way since the last time you could successfully play a DVD, it could be that the drive has failed. You can test this most easily by taking these DVD's that won't play in your Acer now, and play them in another good computer, or a regular home DVD player. If they play in your other systems/players, you will see right away. And if the machine is that new, you might be able to get it easily fixed under your manfuacturer's warranty.

If you have made any kind of changes to your system software that could affect your dvd burner, that could cause it to not recognize them perhaps, as well. By changes I mean - installing some kind of alternative dvd playing software than what came with your machine, etc. If you did not make any software changes, it is likely a hardware problem.