If your Office 2013 and Office 365 breaks or starts to behave strangely,
the best way to fix it is normally uninstalling and reinstalling the whole
package.

But every now and then, an app is messing around, not only with Office, but also
with the install/uninstall process.
If this ever happens, you could find yourself in a situation, where you neither
can uninstall, nor install Microsoft Office.

For this occasion, Microsoft released a FixIt utility dedicated to forcefully remove
broken Office installations.