If you want to keep some documents on your machine not accessible to other users, you can use the features of Windows Explorer. It gives you good detailed options about not allowing users to access your files and documents
Here is how to restrict access of users to your files:
Step One: Open Windows Explorer. Navigate to the folder you want to restrict:
Step Two: Click on “Share” from the top toolbar:
Step Three: Select “Advanced security” button:
Step Four: In the new window, in “Permissions” tab, double-click each user who logs on that machine:
Step Five: Choose the control level you want to enforce for each individual user:
Don’t forget to press “Apply” and the access to your folder will be restricted to the users you have selected!