The Most Dangerous Computer Viruses

Computer viruses are often a nightmare that may cause extensive damage to your precious machine. A virus may significantly interrupt the performance of your system. Furthermore, it has the potential of wiping out everything on your hard drive. Computer viruses are deadly in a similar way that pneumonia, cancer and other deadly disease are to people. They are designed to replicate themselves and corrupt your system making it ineffective and helpless. If you have had a virus attack, then you will know why it is important to know the most dangerous computer viruses in the market. Having information on a number of them can be quit helpful in case they affect your computer.



The first time Nimda went viral was in 2001. The interesting fact is that the name of the virus is derived from the word ‘Admin’ spelt backwards. It took a minimum of 22 minutes for Nimda to propagate through four different ways – file transfer, shared folders, server vulnerabilities and e-mail.


The virus was believed to be a Cyber Terror attack since it was realised about a week after the 9/11 attacks. This forced many people to believe it being a terror attack because of the fact that it captured almost each source that a virus can use to effectively infect most computers.  However, the main purpose of the virus was to cause a significant decrease in internet traffic to the point that it effected a denial – in – service attack. Since then, there have been many replications of the virus such that Nimda has become the source of creation of viruses that are similar in its replication and infection.



A computer worm, known as Conficker and other names such as Kido, Domnadup, Downup, made its way into as many as 15 million Windows operating systems internationally in 2009. It made its way without being created as it was a patched Windows flaw. It can be described as a very hard to detected virus because it can only be effectively detected by running an upgraded version of original malware scanner and anti-virus.


It has the ability to spread using removable drives such as thumb drives, smart phones and hard disks. Conficker adds a corrupt file to any of these devices such that when it is added to another computer, there is an additional option on the AutoPlay dialog box. Conficker has managed to assemble a number of zombies which have the potential of stealing important information from your computer such as your financial data. It is present in this list because it is still considered to be among the most dangerous computer viruses.


Storm Worm

This is a virus that got its name because it cane embedded in an email that stated ‘230 dead as storm batters Europe’. It was (and still is to a point) one of the greatest and most sophisticated cyber fraud networks to be constructed. It could turn any Windows computer into a botnet the moment the user was tricked into clicking a fake link in a virus infected e-mail. By 2007, it was estimated that at least 10 million computers infected worldwide were the work of the virus. It is still working in the present day, and there are other upcoming viruses that use the same modus operandi. The only way to avoid getting attacked by such viruses is using one of the leading anti-viruses in the world today.