Learn how to unprotect Excel sheets or workbooks without a password using this simple step-by-step guide. No software required!

How to Recover Lost Excel 2007 Data From an Unsaved Worksheet. Digital disaster can strike in an instant when a program that contains important information closes unexpectedly.

At the file level, you can password protect an Excel workbook in two ways: You can determine who can get in and who can save changes.

How to Recover an Excel Password in OS X. The Mac operating system provides a way for you to lock Excel with a password to prevent unauthorized use by using Keychain Access.