Try and make a folder on your desktop that's named EXACTLY what the CD is named and then copy all the contents of the CD to that folder. If everything copies OK, try and run the install from there. If it still doesn't copy over, you've most likely got a bad disc.
I'm sure it's been done, but has he looked at the CD? Fingerprints, scratches, dust and any other kinds of nasty particles may be what's causing the issue. Clean the CD with a soft cloth, and maybe use light soap and water to clean it that much more. Maybe that'll help. If not, get a new CD.
Hope this helps!
~Bob
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