Have you ever left your computer logged in when you have had to race off to a meeting or lunch? I used to leave it logged in. One day my boss questioned me about an email sent from my computer, asking her if I could have babies with her. A colleague had played a joke on me. I soon learned to lock my computer whenever I was not in front of it.

Locking a computer is a fairly simple task. The Windows+L key combination will lock your computer instantly. It is still easy to forget though, so why not automate it with a little help from Bluetooth!

Bluelock is a small program that runs in your task tray. It detects if you (your phone) has moved away from your computer. If Bluelock can no longer find your phone because it is out of range, it will automatically lock your computer. When you return, you can type in your password, knowing that your computer was safe during your trip.

There is no installation required on either your phone or your computer. In fact, no software is needed on your phone at all. All that is required is Bluetooth on both your computer and your phone. I found it to be very reliable in my testing in both XP and Vista.

Many devices still have an older version of Bluetooth in them which has a range of 10 metres. Unfortunately, newer Bluetooth signals can reach up to 100 metres on a good day, so for this program to work, you will need to be more than 100m away from your computer.

Bluelock is available for free from Wuuls Website.