Yes...if you got the DVD from MS, it could may be a damaged disc to the point where the ISO is unreadable. But I highly doubt that, as I've never heard of this happening with any MS product (not a fanboy, just saying). If it is a non-legit copy, well, what do you expect?
I've seen this happen before. Not all DVD's are created equal after all. If it's a official disk, the OP probably just got unlucky. If it's an illegit copy... well as you said... what did you expect?