WinMute 1.5.0 adds new options to mute your Windows-PC on shutdown, logoff or suspend (thanks @zhudock for the suggestion).
This should come in handy, when waking the laptop for a presentation, but a youtube video is still running in browser ;).
Note that WinMute does not automatically restore the audio volume after reboot, logon or wake-up, as this would defeat the purpose.
Alternative and anti-virus secured download locations: