1. Start Microsoft Excel 2007.
2. Click the Microsoft Office Button located in the upper left corner.
3. Click on 'Excel Options' and choose 'Add-Ins.'
4. Choose 'Excel Add-Ins' in the 'Manage' box and click 'Go.'
5. Clear the check box next to the add-in or add-ins you wish to uninstall in the 'Add-Ins available' box. Press 'OK' when finished.
6. Close Excel and all other programs.
7. Open the 'Control Panel' from the 'Start Menu' and double-click the 'Programs/Programs and Features' icon (Vista) or the 'Add/Remove Programs' icon (XP).
8. Choose Microsoft Excel from the list and click 'Change.'
9. Follow the onscreen instructions to select the correct add-in and uninstall it from the list.