Here’s a quick tip to secure important Microsoft Office documents, spreadsheets and presentations.
In Office, open the document and click on File at the top. Here’s what it looks like in Word.
Here’s a screenshot for Excel.
And for Powerpoint.
Then select Info at the left.
Choose Protect. (Document, Spreadsheet, or Presentation depending on the program.)
Choose Encrypt with password.
Enter the password and press OK. Keep in mind that this password can’t be recovered. If you lost it, you’ll be locked out forever. The passwords are case-sensitive.
From then on, any time the document is opened, a password will be required.