We show you how to protect a worksheet in Excel, as well as how to lock specific cells and formulas in Excel from editing or formatting.

Learn how to lock and hide cells, apply passwords, and choose permissions to protect your Excel worksheets and workbooks from unauthorized or accidental changes.

You can have Excel make a spreadsheet in read only format for others, so that people can read its contents but not edit them, or you can enforce other content restrictions.

Want to protect an important Word document or Excel spreadsheet? Here's how to add a password, make documents read-only, and tap into other tricks to safeguard sensitive files.

Can't launch Excel file because of the personal.xlsb is locked for editing error? Hide the preview pane or save in a macro-enabled format.

The Excel file may say it’s locked if the user who shared it with you is currently editing the document. It can also be because the Office app running in the background has already opened the file.