How to Lock Excel Workbooks

1. Go to the 'Tools' menu in Excel 2003, point to 'Protection' and click 'Protect Workbook.' In Excel 2007, go to the 'Review' tab and click 'Protect Workbook.'
2.
Protect the workbook window so that it cannot be re-sized or repositioned. Select the 'Windows' check box.
3.
Protect the structure of the workbook so that it cannot be moved, deleted, hidden or renamed by selecting the 'Structure' check box.
4.
Add a password in the 'Password' box to prohibit users from removing the 'Structure' or 'Windows' protection. Click 'OK' and re-enter the password when prompted.
5.
Require a password to open and/or modify the workbook. Click the 'Office Button' in Excel 2007 or 'File' in Excel 2003 or earlier and select 'Save As.' Click 'Tools' on the 'Save As' dialog box and then select 'General Options.' Enter a password in 'Password to Open,' 'Password to Modify' or both and then click 'OK.'