For some reason, there's very little out there on a quick way to find and stop all skype services (this is now needed when running skype updates.)
Skype has it's own powershell commandlets for doing a variety of administration for skype systems, in this case we're going to leverage a single line command to get and stop all services:
*****script start*****
get-cswindowsservice | stop-cswindowsservice
*****script end*****
I have seen cases where this will simply hang out because the services themselves are locked up. In those cases, you either need to wait out the service stopping, or force a reboot and try again after your server is back online.