The Prohibit Flyweight Patching machine setting should be configured correctly. This setting controls the ability to turn off all patch optimizations. If you turn on this policy setting (set to 1), all Patch Optimization options are turned off during the installation. If you turn off this policy setting, it enables faster application of patches by removing execution of unnecessary actions. The flyweight patching mode is primarily designed for patches that just update a few files or registry values. The Installer will analyze the patch for specific changes to determine if optimization is possible. If so, the patch will be applied using a minimal set of processing. Fix: (1) GPO: Computer Configuration\Administrative Templates\Windows Components\Windows Installer\Prohibit Flyweight Patching (2) KEY: HKLM\Software\Policies\Microsoft\Windows\Installer\DisableFlyweightPatching