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.

Microsoft Excel has several features designed to help you recover unsaved versions of files and prevent data loss.

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.