How to Unprotect a Spreadsheet in Office 2007. Microsoft Office 2007 has several programs that facilitate the day-to-day operations of small businesses, including PowerPoint, Word and Excel ...

Launch Excel and open the protected worksheet. Select the "Review" tab, and then click "Unprotect Sheet." Enter the password, if prompted.

14. To make all cells editable again, click on "Unprotect Sheet" — which is in the "Protect" tab under "Review" — and re-enter your password. The cells will now be unlocked.

The ability to lock cells or elements of Microsoft Excel and Google Sheets, but not the full sheet, allows maximum customization and control of a project.

Safeguard your Excel worksheets from accidentally deleting formulas or data sets by locking important cells, while leaving the rest of the worksheet editable.