Make Programs and Features 'Change' button prompt for authentication

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http://serverfault.com – I am looking for a way to have the 'Change' button in Programs and Features pop a UAC authentication dialog such as when installing an application for the first time. Currently, we don't deploy PowerPoint due to company policy, but users have the ability to add it themselves via Programs and Features. Some users need the application, so removing it altogether isn't an option either. Thanks! (HowTos)