Look for an old version of Acrobat Pro on that computer. If you find one installed, uninstall it and see if that fixes the issue. Also make sure that you don't have any anit-virus programs interfering with the install.
For More Information see: http://forums.filemaker.com/posts/1dd95f9381?page=1
This is one of many acknowledged bugs that can be found in the Known Bug List thread here in the Report an Issue section of the forum.
It can also be downloaded as a database file from: https://www.dropbox.com/s/jt09b82i0xijbu3/FMP%20Bugs.zip
I tried reinstalling with Norton antivirus turned off and it's still corrupted. I also don't have any old acrobat versions on the system other than version 11. This is confusing since it installed fine on 3 other machines with the same av and win7 setup.... More help please..
You may want to call Tech Support for assistance. They aren't supposed to charge for installation issues and they can provide assistance in real time.
You may also want to start an Issue Report over in Report an issue where the TS personnel monitor the issue reports in search of new bugs not yet reported.