How do I open that file? Windows 10 attaches that file to explorer.exe and it obviously detects launched .exe. I want to know which games are known to Windows 10 and what settings it applies or tries to apply to those .exe files? I think the official name for that component is Game Explorer. I think this file is additional related to "Computer\HKEY_CURRENT_USER\System\GameConfigStore" Parent and Children entries. Why I think so? Because NTLite removes entries under Parent and Child when it removes Game Explorer and Xbox-related components.