To fix the Win + G Popup when launching Citrix apps/desktops from Windows 10 Machines with the latest patches.
When launching published apps or desktops from a Windows 10 OS a green popup windows briefly appears prompting to press Win + G for the game bar or for the search bar.
Open Registry Editor (Run > regedit)
Navigate to HKEY_CURRENT_USER\System\GameConfigStore
Set the value of DWORD "GameDVR_Enabled" to 0
Go to HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\
Create key "GameDVR".
Create DWORD 32bit called "AllowGameDVR" and set to 0
Restart your computer.
By default Windows 10 has the DVR function enabled.
SageLike Post ID: SL0015
Windows 10 - Both endpoint devices and VDI's