Posted 06 August 2011 - 02:05 PM
If the drive cannot read a particular CD/DVD...try each of the various types (bootable, data, program, purchased, made by self) and try to be more definitive about just what the problem is.
A problem with a particular DVD...is not a problem to be concerned with, since it's probably a bad/dirty DVD. A drive that cannot read any DVD (bootable, data, purchased, made by user) points to a possible lens/drive problem, IMO. IMO, this happens frequently enough, resulting in purchase of a new drive by me.
I would disconnect the drive (with system off), run the system without it for a few minutes...turn system off and reconnect properly...as part of my testing.
I would also look in Event Viewer for multiple errrors indicating "bad block" for the drive...to see how far back it goes.