Techno Wireless PC Lock

There are any number of business and educational computing situations - and some home ones, too - when it's a really good idea to lock your workstation in one way or another if you're walking away from it for a while.

Mischief, industrial espionage, invasion of privacy; all kinds of bad things can happen when you leave a computer logged in and wander off. It's called a Wireless PC Lock, and its basic purpose in life is to lock any Windows box (98SE, ME, 2000, XP) when you walk a few metres away from it, and unlock it again when you return, without you having to do a thing.

A tiny flea-power radio transmitter (315MHz for the American market, 434MHz for everywhere else) sits in your pocket, a not-much-larger receiver plugs into a USB port, and whenever the latter can't hear the former, the computer's locked. Simple as that