I am using Excel 2003, but my document has a lot of important information, how to set a password for Excel file? Can you help me?
To protect personal information for your Excel files, you can use the function of password setting in Microsoft Office Excel 2003 according to the following instructions:
Open the Excel file that you need to set a password, on the Menu bar, select Tool then Option, select the Security tab. Enter your password in the Password to Open box and click OK.
When Confirm Password window appears, please re-enter the password to confirm the password you have selected and click OK to complete.
Good luck !