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To uninstall Office 2010 14.0.4302.1000 if you have an uninstall error message “This product installation has been corrupted”.
The Problem is a missing file in the installation folder of office 2010. Office 2010 has an Setup Controller directory and uses the directory to check the installed components. please check the directory “C:\Program Files\Common Files\Microsoft Shared\OFFICE14\Office Setup Controller\Groove.en-us\”. if you have no “Setup.xml” file there please copy the file from the “Groove.en-us” directory of the source files to this directory and test the uninstallation again.

Source: http://social.technet.microsoft.com/