Users of NVIDIA cards that support the NVidia Capture API (Quadro, Tesla, etc) will find this limitation only applies to the Windows Logon Screen and Shutdown Screens, the NvFBC capture API is able to capture the "Secure Desktop" outside of Microsoft's control.
UAC Dialogs should be able to be bypassed with a reg tweak to disable 'PromptOnSecureDesktop' ( '''Not Tested with Looking glass''' )
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HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
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change ''PromptOnSecureDesktop'' DWORD value to '''0''' to disable and '''1''' to enable.
=== The Windows host program doesn't work as a service ===