Originally Posted by Makaveli213
It is a bad pirated copy. Just admit it and move on and download it again.
That's what I was going to say. The iso is corrupted.
You never told us how you obtained the iso. If you actually borrowed a friend's CD/DVD and made it yourself, the problem could be copy protection. Some companies actually use techniques to keep you from being able to copy something. This was very popular in the Commodore days. Now it's mostly activation, authentication, and codes. But some are using copy protection algorithms.
But that doesn't make sense because you would have just installed it from your friend's CD.
I still think it's a corrupted iso, though.