What's the keyboard shortcut to turn off a Win10 PC please

We're having extreme gusts at the moment and my Internet connection is occasionally shutting down. When this happens my PC freezes. [I assume that's the cause and that it's normal - I'll check later.]

Some here recently told me how to shut down my PC from the keyboard - I must have copied & pasted it wrong. Could someone please spare a moment to tell me it again please? Thanks