Microsoft Office Questions? Ask a IT Expert for Support ASAP
Most of the time you can go to the folder where it is installed and delete all the files. Then try to re-install.
If that does not work, use the Microsoft tool to fix the problem --> http://support2.microsoft.com/default.aspx?scid=kb;en-us;290301
Please let me know if the issue has been resolved or if I can help further.