How to Make Excel 2003 Not 2007 Your Default Program

1. Open the Windows registry by clicking 'Start,' selecting 'Run,' typing 'regedit' into the 'Open' box and clicking 'OK.'
2. Navigate to 'HKEY_CURRENT_USER>Software>Microsoft>Office>12.0>Excel' in the registry by clicking the arrow to the right of each of these folders.
3. Right-click the 'Options' key inside the 'Excel' folder, point to 'New' and select 'DWORD Value.' Type 'NoReReg' over 'New Value' to rename it.
4. Right-click 'NoReReg' and select 'Modify.' Type '1' into the 'Data Value' box. Click 'OK.' Close the Windows registry.
5. Open Microsoft Excel 2003. Click 'Help' in the toolbar. Select 'Detect and Repair' and click 'Start.' After 'Detect and Repair' is complete, click 'OK.' Close Excel 2003.