As seen today on the Full Disclosure mailing list:

{BIMPIN ADVISORY}

[PLATFORM]

I TESTED THIS ON A WINDOWS XP BOX. IT WAS PATCHED.

<DISCOVERY>

aLMOST EVERY COMPUTER HAS A SWITCH ON IT SOMEWHERE. SOMETIMES THEY ARE

VIZIBLE, SOMETIMES THEYR HIDDEN. IF A HAQQER WERE TO TAMPER OR MOVE THIS

SWITCH, IT COULD CAUSE A MASSIVE DOS ON THAT MACHINE.

{THE EXPLOYT}

FIND AN UNATTENDED PC THAT IS TURNED ON. FIND THE "SWITCH"

MOVE THE SWITCH UP AND DOWN OR IN AND OUT. IF YOU DO IT RIGHT, THE MACHINE

WILL DOS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1%%%%%

Sad to hear that even Microsoft can't patch this big gaping hole... I tested this on MacOS and Linux and it appears that it is exploitable from those operating systems as well :p