Windows 7 autorun error 0xC1

I try to run Windows 7 I have downloaded, I mounted it to a DVD-R.
It says Autorun.dll is corrupted. Then it says the SPWIZENG.dll is corrupt as well. I looked into the ISO and looked at the .DLL through Notepad and it was empty. Even though it is 343 Kilobytes.
How do I fix this? I don’t want to download the ISO again….
Answer #1
Well, you should not try to fix it by yourself, I recommend you to download the .iso again.
From:
http://www.google.com?t=5706092&highlight=
That’s best copy.