How to Write a Protected Excel Spreadsheet

1. Launch Excel and create or modify the data in an existing worksheet to suit your particular needs. Click on 'File,' and 'Save' to save your work.
2. Click on the 'Tools' menu. Select 'Protection' from the drop-down menu that appears, and then select 'Protect Sheet.'
3. Type in a password of your choosing when prompted, and click 'OK.' Remember this password as it will be required when making changes to the worksheet.
4. Protect the entire workbook of worksheets you have created by clicking on the 'File' menu, and then selecting 'Save As.' The Save As dialog box opens.
5. Click on the button labeled 'Tools.' Select 'General Options,' and the Save Options dialog box opens.
6. Type in the password of your choosing in the text box, and click 'OK.' This password will now be required to open the workbook file.