1. Open Excel 2003 and click the 'File' drop down menu. Select 'Open.' Browse the files and locate the workbook. Click the workbook and the 'Open' button. The workbook opens.
2. Click the worksheet that contains the locked cells. Click the 'Tools' drop down menu and select 'Protection.'
3. Select 'Unprotect Sheet.' If a password was applied to the protection, you will be prompted to enter the password. Click 'Ok.'
4. Click the 'Format' drop down list and select 'Cells.' Click the 'Protection' tab and de-select the 'Locked' option. Click 'Ok.' The lock is removed from the cells.