Microsoft is aware of a known issue with the following scenario:

You are running Windows 10 version 1607 and have the Get Office app installed (version 17.7909.7600 or later).* The app may have been preinstalled with the PC or installed via the Store.
You perform “Reset this PC” with the “Remove everything” option.
During the reset, you receive a warning that some of your files cannot be removed.
The reset completes successfully, however some of the factory settings configured by the PC manufacturer might not be restored correctly.
If you then perform “Reset this PC” with the “Remove everything” option again, the reset operation fails.
*
We are currently working on this issue and will update this thread when a fix is released.*
For more detail, please see:
https://answers.microsoft.com/en-us/...8-c198651cb717