7 Most Dangerous Computer Viruses in The World

Computer viruses

Viruses are one of the most scary malicious computer programs for computer users. Because it can attack computer systems, it can even erase important data on the computer.

Some viruses exist that until it causes serious damage to the computer system. Security experts are made busy to handle this virus and create software for eradicate.

The Virus acts like a disease, it damages the computer system in various ways. Well what are the most dangerous computer viruses in the world? Here we summarize for you.

1. Nimda

This Virus appeared first in the middle of September 2001, exactly a week after the September 9 attacks. The name of this virus is derived from the word “Admin “, it’s just the words in reverse.

Nimda spreads through internet media such as by email, web, file sharing, or utilizing security gaps that exist on Microsoft Internet Information Services (IIS) WEB servers.

The Worm has rapidly infected and crippled thousands of computers around the world and is reportedly still spreading, but slower.

2. Storm Worm

Storm Worm is a deadly and very destructive Trojan virus. This malicious software first appeared in 2006 and spread through an electronic message a.k.a. email that included a link.

It was a lot of computer users who complained that they received spam emails with the message “230 dead as storm of European batters “. If the link is clicked, the virus will infect the computer and allow the computer to be remotely controlled to spread spam email on the internet.

3. Conficker

Conflicker is included in the virus category which is very dangerous because its spread is very fast, it was found in October 2008. The virus is also known as Downup, Domnadup and the Kido virus.

Conflicker is spreading through Microsoft Windows operating systems, most of them attacking Windows XP. The Guardian’s page predicts Conficker has infected 3.5 million PCS in 2009. The number of infections increased to almost 9 million PC hoses a day later.

4. Code Red

Code Red wandered from June 2001. This Worm can damage various network servers by utilizing existing gaps in Microsoft Internet Information Server. This Virus will make the computer buffer full so that it will drain memory.

The Worm spreads by simply utilizing the Internet connection, then deface the currently opened Web page. So not through the trap method of opening an email attachment or clicking a URL.

Code Red has managed to make more than 400,000 servers down instantaneously, and raises US $2.6 billion in losses.

5. Melissa

Melissa is one of the most dangerous computer viruses ever. On March 26, 1999, the virus became a worldwide news headline. This Virus has managed to infect 20% of computers in the world in a short time.

This Virus contaminating the system via email attachment titled “Here is that document you asked for, don’t show it to anybody else”. If the attachment is clicked, the virus replicates itself and automatically sends itself to 50 other email addresses found in the victim’s email address book.

Antivirus has been created to disable this virus but can not remove this virus completely.

6. CIH

CIH enters the virus category as dangerous because this virus is difficult to detected. It will infect any application that is on your computer. Losses arising from this virus reached more than US $100 million.

CIH was first detected in Taiwan in June 1998. CIH is named as one of the most dangerous computer viruses ever created. This Virus can also be able to tamper with the computer BIOS to prevent booting.

It infects Windows operating systems 95, 98, and Windows ME.


No doubt, ILOVEYOU virus is one of the most dangerous malware in the world and the hardest to be eliminated. He can replicate himself.

The Virus was first discovered on a computer system from the Philippines on May 4, 2000. What is interesting is its deployment method. This Virus makes use of the public’s curiosity by sending a love letter by email with the subject “ILOVEYOU “. Therefore, this virus is also known as Love Letter virus.