How to Protect Cells From Modification in Excel 2003

1. Open Windows and pull up your Excel spreadsheet. You should be able to locate the program by using your 'Start' button. When you cannot find it there, use your 'Search' or 'Find' function.
2. Highlight the cells to be protected. Choose 'Cells' from the 'Format' menu. Select the 'Protection' tab. Check the box to the left of 'Locked'.
3. Go to 'Tools'. Hold the mouse on 'Protection'. Then click 'Protect Sheet'.
4. Enter a password if you want to use one. If you do not want a password, just click 'OK'.