Password Protect Office documents
Open the desired Word document you would like to password protect and click on the ‘File’ option. Towards the right-hand side you will observe a ‘Protect Document’ option.
Click on the option and you will find new options highlighted below
Our special interest lies in protecting the document with a password of choice i.e. Encrypting it with a password. So, select the second option from the above. When done, the Encrypt Document dialog box appears. In the Password box, type a password. Remember, if you fail to remember the password, Microsoft will be incapable of retrieving the lost or forgotten password, so keep a list of your passwords and corresponding file names in a safe place. Choose a strong password and then select OK.
Re-enter your desired password in the Confirm password window and click OK.
You will now see the new required permissions.
Hope that helps!
Now read: How to Password Protect PDF File in Word. If you need to stronger protection for your files and folders you may try one of these Free File Encryption Software for Windows.