How to protect your computer from worm virus

A computer repairman passed on this computer trick today that's really ingenious in its simplicity so I thought of sharing here. As you may know, when/if a worm virus gets into your computer it heads straight for your email address book, and sends itself to everyone in there, thus infecting all your friends and associates.

This trick won't keep the virus from getting into your computer, but it will stop it from using your address book and spreading further, and it will alert you to the fact that the worm has gotten into your system.

Here's what you do:
Firstly, open your address book and click on 'new contact,' just as you would do if you were adding a new friend to your list of email addresses.
In the window where you would type your friend's first name, type in 'A'.
for the screen name or email address, type AAAAAAA@AAA.AAA

Now, here's what you've done and why it works:
The 'name 'A' will be placed at the top of your address book

Point #1.
This will be where the worm starts in an effort to send itself to all your friends. When it tries to send itself to AAAAAAA@AAA.AAA, it will be undeliverable because it is an invalid email address. If the first attempt fails (which it will because of the phony address), the worm goes no further and your friends will not be infected.

Point #2.
Here's the second great advantage of this method. If an email cannot be delivered, you will be notified of this in your In Box almost immediately.
Hence, if you ever get an email telling you that an email addressed to AAAAAAA@AAA.AAA could not be delivered, you know right away that you have the worm virus in your system. Then you can then take steps to get rid of it and protect your computer! Pretty slick huh? Less worry about opening mail from friends.