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There are two possible explanations for this issue:

1) A bad burned disc (or a low quality disc)
2) A bad ISO file.

If the ISO file is the problem, then you need to create it again from the original, and this solve the problem. How did you create tie ISO from the original?

About the media, what disc are you using exactly? DVD-R 8x is a bit too generic. At what speed did you burn that disc? Are you sure that the burner has the latest firmware installed?

Maybe you can also download latest version of ImgBurn, that is basically the same burning engine of DVD Decrypter, but more updated.