Imagine walking away from your computer, and it automatically locks everything down. Walk back, and it automatically unlocks itself for you. Now stop imagining because it's already...

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Imagine walking away from your computer, and it automatically locks everything down. Walk back, and it automatically unlocks itself for you. Now stop imagining because it’s already here.

There are countless software utilities that let you secure your PC with just a mouse click or keystroke. Entering a password will once again grant you access back in.

There are countless hardware devices that let you secure your PC, from physical locking devices that keep the keyboard secure to devices that plug into a USB port. Most of the latter look a lot like a USB flash drive. Acting much like a key, when you insert the device into any USB port on the computer, you have full access. Remove it and everything gets locked down.

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One variation even has a tiny fingerprint scanner built into it so that even after plugging it in, you still need to swipe a finger across the reader before you can begin.

Recently I came across yet another USB locking system, but one that adds an unusual twist that upon reflection seems to offer the most unobtrusive method of access security.

The USB Wireless Security Lock offers the simplicity of the aforementioned USB port keys, but you don’t have to keep plugging and unplugging the device. You just simply get up and walk away to lock it. That’s it. Just the action of getting up and walking away from your computer locks it down.

Walking back to the computer unlocks it without your having to do one single thing more. So how does it know when you are away and back? You carry on your person a tiny radio-frequency transmitter. The device is so small that it can easily fit onto a keychain.

Looking like a tiny black and green yo-yo, the device needs to be within around 6 feet of the computer. The USB receiver senses its presence, and all is just fine. Any farther away, the USB receiver loses the signal and it’s a lock.

The USB Wireless Security Lock reminds me of how some of today’s newest automobiles implement their locking and unlocking procedures. My own car, for example, has the transmitter built right into the key. It’s pretty much like most other cars when locking the door. But to unlock it, I merely have to be right next to the door, pull on the handle and I’m in.

Anyone else trying to open it without the transmitter will not be able to open the door.

I have to tell you that since owning this car, not having to fumble for the key is a godsend. Just walk over to the car and get in. You don’t have to do anything more.

I would think that the same scenario with a computer would also be so much less of a hassle, especially if you’re one of those people who has to constantly get up and come back to the computer throughout the day.

By the way, if for some reason you manage to lose the security yo-yo, the setup will grant you access via a password override system.

The USB Wireless Security Lock comes with everything you need to make it work including the battery. The USB Wireless Security Lock works with most versions of Windows and sells for $29.99. It’s available from ThinkGeek.com (www.thinkgeek.com).