Support does not provide support for problems that arise from improper modification of the registry. The Windows registry contains information critical to your computer and applications. Make sure you back up the registry before modifying it. For more information on the Windows Registry Editor and how to back up and restore it, refer to Microsoft Article ID 256986 “Description of the Microsoft Windows registry” at Microsoft Support.
This is a simple script using the following Application Patch as an example to remove "Application Patches" where WUSA won't work to remove patch through a script.
NOTE: Make sure to search for the Package ID of the patch you wish to uninstall. This script is intended to remove the application patch silently.