Removing Microsoft Visual Studio 2010 Tools for Office Runtime (x64)
If you are ok with just removing it from the add/remove list, you can delete the appropriate subkey, based on the value of the DisplayName, from this registry key:
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall
If you are running a 64bit version of windows you can also check this registry key as well
HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall
This is based on information from the Microsoft kb314481. It was written for XP SP3, but still applies to later versions of Windows.