this is the problem (same for 2013).
i have a windows 7 64 bit with ACAD 2012 on the system.
earlier this year, i tried installing 2013 and the same thing happened when i tried installling 2014.
i click on 'setup.exe' and it will run through directx, libraries, etc. but when it gets to "copying new files..." then it says "rollover" and "fonfiguring" with the whole progress bar reverting backwards, ending the installation with no new software installed.
This is probably easily figured out by looking in the installation log file on your summary screen. If you need help, post it here. I have a few 1603 fixes that likely will get you up and running.
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