I recently purchased Office Home and Student 2007 and was using it on the PC side of my iMac via Parallels. After a sudden loss of electric power the computer shut down and after rebooting, I was unable to reload my Parallels program resulting in the loss of the Office 2007 program. When I tried to reinstall it, the program complained that it could not find a 'controller' file and would not install. Anyone out there able to advise me?