Change product key in Office 2010; HOWTO

1. Control Panel
2. Uninstall a Program / Programs & features
3. Office 2010
4. Click on Change button
5. Choose Enter new product key & Press Continute
6. Type your new product key and also make sure to check the option Attempt to automatically activate my product online to automatically activate your Office 2010 suite. Now click on Continue and then on Install Now.