We take steps to ensure our computers are safer everyday. But if you need to let someone borrow your computer, you can protect your documents from their prying eyes with a simple password.
1. In the Word menu, click Preferences.
2. Select Personal Settings >> Security.
3. Password to Open or Password to Modify
“Password to Open” means the document doesn’t open without a password. “Password to Modify” lets people open and view it in read-only mode: they can’t make changes without the password.
The file will be saved with a lock on it, so you can tell it’s protected. If you select both of the above options make sure to use different passwords for opening and modifying.