Worm Viruses - Free Antivirus Software

A program or algorithm that replicates itself over a computer network and usually performs malicious actions, such as using up the computer's resources and possibly shutting the system.WORM is also called CD-R.

A worm is a sub class of virus.Worm spread from computer to computer through network.it can travel without any human action.It replicate automatically on your computer.worm can send a copy of itself using your email address book.Then, the worm replicates and sends itself out to everyone listed in each of the receiver's address book, and the manifest continues on down the line.

It travel across the network so it consume more too much system memory or (network bandwidth)causing web server,network server and individual computers to stop responding.

The blaster worm has been designed to tunnel in to your system and allow malicious user to control your system remotely.

Worm can spread using internet.They may go often Undetected by anti virus software because the update that would enable the worm have been not yet downloaded.

Removal Tool.
The safest and most effective way to disinfect a computer that has been infected by an Internet worm is to use a dedicated removal tool. These tools are provided, free of charge, by several of the anti-virus software developers. Even if you have an anti-virus product on your computer that detects the worm, it may still be safer to remove it using one of these dedicated removal tools.

Tried and tested software absolutely free for you.

http://support.microsoft.com/?kbid=833330