Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Try doing an Office Repair :
Repair or Uninstall Office 2010 / 2007 - http://office.microsoft.com/en-us/excel-help/repair-or-remove-office-2010-HA010357402.aspx?CTT=1
If that doesn't work (I suspect it won't, but it's worth a try), check to see if you have a "click to run" installation and let us know:
Am I running Click-To-Run?
The quickest way to verify you have a CTR installation is go into Windows Explorer and look for an unexplained Q:\ (or R:) drive.
Another method of checking: Go to help panel of any working app: File tab / Help command and look at the Right side of the Backstage panel. It should say "Product Activated" for MSI install or "Click-to-Run Product Updates".
If you installed Office 2010 using Click to Run technology, there are no Office files on the C drive, but on a virtual Q drive. "Microsoft Office Client Virtualization Handler" will appear in the list of programs. Associate the Office files with that
Also see http://www.officeforlawyers.com/outlook/tips/2010beta.html for tips about uninstalling Click-to-run version.
CTR Introduction (Identify CTR installation) - https://office.microsoft.com/en-ca/excel-help/click-to-run-introduction-HA101850493.aspx?CTT=3
What is Click to Run
Click-to-Run is a new Electronic Software Distribution (ESD) technology for Office 2010 that utilizes Microsoft’s streaming and virtualization technology. Click-to-Run provides a much faster and simpler download and installation experience for customers trying or buying Office 2010 over the Internet. Click-to-Run allows customers to maintain multiple versions of Office so customers can easily try Office 2010 side by side with an existing version of Office. Click-to-Run automatically downloads and installs any software updates when connected to the Internet, helping to maintain a more secure and up-to-date Office experience. At this time, only Office Home and Student 2010 and Office Home and Business 2010 will be available through Click-to-Run and limited based on broadband speed requirements.
**NOTE:**CTR is a relatively new approach to installing and running Office. Introduced with 2010. So very few technicians are aware of it, let alone familiar with trouble shooting it. As well, it introduces a whole new set of errors, like the one that you encountered. My personal recommendation is that unless you have a clearly identified need for it and explicitly requested the download, DON’T USE IT.