How to lock cells in Microsoft Excel, so you need a password to change or erase data

You can lock cells in Excel by heading into the program's "Protection" tab. There, you can set a password, and protect your ...
HowToGeek on MSN

Need to Hide Cell Values in Excel? Use This Little-Known Tweak

Did you know that you can hide data in individual cells or ranges of cells in Excel without changing your spreadsheet's ...