A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I'm not sure about what you are talking about as a "longer repair" - but if you can fix it without uninstalling and reinstalling, great.
If you have to uninstall and reinstall, after uninstalling, I (personally) would go into C:\Program Files(x86)\Microsoft Office\Office 14 and delete that folder and all of its sub-folders. That will force the reinstall to recreate all of those files during the re-installation instead of possibly saying to itself "do I need to install this file from the disk? Oh, it's already here, no I don't" and leaving a corrupted file in place. Not a must do, but it is what I'd do.