MSTSC doesn't capture and send system keys (Win+D, Win+U)

If you hit any registered system-wide key combination like Win+D or Win+U, they will be catched and executed by host system where MSTSC runs.

If you hit any non-registered Win+X keys, they will be sent to remote computer like simple keyup/keydown without Win modificator, so they will be recognized like just keystrokes.

All Win+X key combinations should be captured by MSTSC (in full screen mode) and sent to remote computer.