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I tried a few times to get AutoCAD 2012 to install (or re-install I should say) on my PC. I had 2012 on my machine before, but I had to reformat my C fairly recently. Now, I cannot install it back onto my machine.
Attatched are two of the log files I got on record.
Try copying the contents of your disc to your hard drive and installing from there with admin rights, UAC off, and anti-virus disabled.