Trojan - Dark Knight

Recently, my laboratory equipment computer caught a trojan*. (I've some idea who might have infect the computer, but no point mentioning here.)
That computer does not has antivirus, or rather, the antivirus is outdated.
It didn't cost me any lost, and my home computer can remove the trojan. But it is still irritating to scan for virus everytime I want to use my thumbdrive and scary to delete trojan everytime, never know when the trojan deletion will wipe out all the hard earn data (*touch wood*). It is in school computer, so it might just spread very easily. Do take note ya.

Anyway, here's what I've found out.

Name
"Dark Knight", or "Knight Disk".

Syptom
The driver/thumbdrive icon in My Computer become a 4-colours shield, instead of the normal rectangular box icon.
Window Task Manager shows an application "Disk Knight" and "Knight.exe".

What harm?
It automatically install itself to any hard drives, C drive, Thumbdrives etc. In fact it is a antivirus itself, to protect computer from autorun virus, but, it install itself in any drives uncontrollably, making it spread, and hence undesirable. It does not have major harm to the computer, but it will continue spreading. If your computer has an antivirus that manage to detect it, your antivirus might stop you from opening the thumbdrive.

What to do?
If your computer has an antivirus that prompt you to remove it, it is safe to delete the trojan. (Disclaimer: At least for me! I delete and my thumbdrive work fine, no info lost. I shall not be responsible for any data lost.)
For more info on how to remove, you can check out this website http://the11throck.wordpress.com/2008/01/14/remove-viruses-that-use-autorun/


*Trojan: A program that appears legitimate, but performs some illicit activity when it is run. It may be used to locate password information or make the system more vulnerable to future entry or simply destroy programs or data on the hard disk. A Trojan is similar to a virus, except that it does not replicate itself. It stays in the computer doing its damage or allowing somebody from a remote site to take control of the computer. Trojans often sneak in attached to a free game or other utility. (From: www.answers.com)