CORRECTION ON THE DATE OF THE PROBLEM PATCH PUSH:
September 5, 2010, but could have been as early as September 4, 2010; his PC was turned off that day.
Please let us know your computer's configuration information, also what is the exact error message that occurs during the installation and when does it fails exactly. Have you tried to perform a System Restore to a previous date (before crash) .
You can also run the MCPR (McAfee Consumer Product Removal Tool) and re-try the installation. Hope this helps you.