Explorer has some bug evidently which stop listening for the shortcut key. The Windows key still works, but the key sequence Windows + Arrow is ignored by the OS.
solution :
1way
End the process tree, by task manager
2way
use powershell :
src - https://superuser.com/a/1137568
solution :
restart explorer.exe
1way
End the process tree, by task manager
2way
use powershell :
JavaScript:
kill -name explorer
src - https://superuser.com/a/1137568