Use the following fixes if the Windows Period key is not working on your system: Check the issue with the On-screen keyboard Reinstall the keyboard driver Try another keyboard Disable Sticky Keys and ...
Accept video call = Ctrl + Shift + A Accept audio call = Ctrl + Shift + S Decline call = Ctrl + Shift + D Start audio call = Ctrl + Shift + C Start video call = Ctrl + Shift + U Toggle mute = Ctrl + ...