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The Worst Computer Viruses

Computer viruses have always caused problems for computers. Some are just pranks and some are extremely destructive. Viruses are programmed to do many things. It can be made to target a specific thing, target multiple things and even have certain triggers that cause the virus to act up when certain things are done. In 1982 a virus named Elk Cloner was spread from floppy disks and would activate on its 50th use. Here’s a list of the worst computer viruses. Read this article to gain information about online antivirus.

The Morris worm

The Morris worm was one of the first worms that gained significant media attention. It was created by Robert Morris, a university student who created it in 1998. The worm affected 10 per cent of the computers. This was around 60,000 computers at the time. This brought the need to improve security on computers. This worm was created to exploit vulnerabilities and spread it self while attacking the system by using various passwords without setting off any alarms. The total damage done by this worm has been estimated from 1 million to 186 million due to as there aren’t exact facts. This resulted in creation of best antivirus for business and homes.

The Chernobyl virus aka CIH

The Chernobyl virus is one of the destructive viruses. It emerged in 1998 and was able to overwrite critical information and sometimes destroy the system BIOS. It was a virus that was created by a student named Chen Ing-hau who was studying at Tatung University in Taiwan. More than 60 million computers were believed to be infected with more than 1 billion dollars loss. Initially the virus was known as CIH but since it triggered exactly on the date of the Chernobyl accident. This incident increased the cyber security in Taiwan where much legislation was passed to limit similar activity. There were improvements in anti virus software.


The ILOVEYOU was a worm that affected millions of windows computers. It started on 5th May 2002 in Philippines. It spread through email messages with the subject line ILOVEYOU, from where its named is derived. When the attachment that came with the email is opened the virus would overwrite random files and would send a copy of itself to all addresses on the Windows address book in Outlook. This made the virus to look like it was an email sent by a friend or colleague, thereby allowing it to spread to millions of computers worldwide. It is estimated to cost 15 billion dollars to remove the worm. At the time it was one of the world’s most dangerous computer related disasters.