If you have nothing to backup, like self made templates etc, delete the office folder completely. That will be found in "C:\program files\". Then run Install/Uninstall Utility and try to uninstall it. If still the error occures, goto
http://www.tune-up.com/ and download tuneup utilities Trial version, Install it and run "1 CLick Maintenance" after it completes, resolve all the errors and then open Tuneup main window and find registry cleaner and run it and then clean registry from errors( a trial version will do all things 4 you but if u think, you may buy). After that again try to Uninstall Office. If still error occures, use TuneUp Uninstall utility. (But use it at a last recourse). DOnt use TuneUp Uninstaller first of all these steps.
I think it will work.