Start the Microsoft file explorer the fastest with the Windows-Logo + E key combination and enter in the address bar: shell:profile and confirm with ENTER.
Even easier one can open the documents with the key combination Windows + R, over the Run-Dialogue in Windows, herewith you can quickly find the documents or open the folder path (directory).
(... see Image-1)
Do not be surprised, the picture has been made under Windows 10, but you can open the documents under any Windows with this solution.
To open documents from other users on the Windows machine, simply use the command line shell:userprofiles and open the folder of the respective Windows user and also click on the documents folder ( double-click ) to be able to view all documents of the respective user.