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Conficker, also known as Downup, Downadup and Kido, is a computer worm targeting the Microsoft Windows operating system that was first detected in November 2008. It uses flaws in Windows software and Dictionary attacks on administrator passwords to co-opt machines and link them into a virtual computer that can be commanded remotely by its authors. Conficker has since spread rapidly into what is now believed to be the largest computer worm infection since the 2003 SQL Slammer,with more than seven million government, business and home computers in over 200 countries now under its control. The worm has been unusually difficult to counter because of its combined use of many advanced malware techniques.

An Indonesian-made virus capable of spreading the virus to your e-mail address in the computer, the victim was at risk of libel as a disseminator virus.Virus taxable is known by the nickname 'the face of cool' aka 'Mr Coolface'. The nickname arose because the computer is infected with this virus always led to the writing MR_COOLFACE! when the user opens the Run menu in the Start Menu view.

virus called Worm: w32/Ridnu.B will increasingly dangerous when he finds the address book in your e-mail the victim. Mr. Coolface will automatically send itself to e-mail addresses listed, the risk of victims could be considered as a virus spreader.

Additionally, when the active virus is also able to use all the resources the victim's computer by opening many windows on the task bar of Windows Explorer, so the victim can not prevent this virus when writing messages.

So how do we know that the folder extension. scr? The trick is to display the 'Hidden files and folders' on the Options menu in Windows Explorer, and remove check mark from 'Hide files extensions for known file types'.

When you are exposed to this virus, you should immediately isolate the computer from the network. If your computer is connected to the Internet network, the virus will immediately send copies of itself to all e-mail addresses in your address book. Defamation can be inevitable.

Computer worms (worm) in computer security, is a computer program that can reproduce itself by itself within a computer system. A worm can reproduce itself by utilizing a network (LAN / WAN / Internet) without interference from the users themselves. Worms do not like a regular computer virus, which multiplies by inserting the program itself to existing programs in the computer, but the worms exploit a security hole that is open, or better known as vulnerability. Some worms also consume the available bandwidth. Worm is an evolution of computer viruses. Only one way to overcome the worm is to close the security hole open, with how to update a patch or service pack of the operating system used with the patch or the most recent Service Pack.

A computer virus can indeed infect files in a computer system, but the worm can do it better. In addition to spread within a system, the worm also can spread to many systems through networks connected to the infected system. Some worms, also can include a virus code that can destroy files, steal documents, e-mail, or do other destructive things, or just make the infected system is useless.

Some examples of the worm are as follows:

    * ADMw0rm: The worm that can do the exploitation of network services the Berkeley Internet Name Domain (BIND), by doing a buffer-overflow.
    * Code Red: Worm that can make the exploitation of the service Internet Information Services (IIS) version 4 and version 5, with a buffer-overflow attacks.
    * Loveletter: worm that spreads by sending itself via e-mail to all accounts listed in the Address Book or Microsoft Outlook Express / Microsoft Outlook contacts list in the code by using Visual Basic Script (VBScript).
    * Nimda
    * SQL-Slammer