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Looking Back at Some of History’s Worst Computer Viruses

By Nextrio on May 14th, 2014 Facebooktwittergoogle_plusredditlinkedinmailby feather

Computer security is essential both at home and in the office. Whether you are storing client data or simply sharing something on Facebook, your computer needs to be clean and secure in order to keep your online and offline life safe. Computer viruses affect this safety by taking information and spreading themselves to other users. Here are some of the worst computer viruses users have experienced so far.


Computer viruses may be a concern for Internet users, but they existed before the Internet became such a commonly used service. In 1987, a computer virus called Stoned was spread from one user to the next through a floppy disk. Once infected, machines would display the message “Your computer is now stoned,” leaving users unable to use their devices.


One of the first well-known computer viruses shared on the Internet was called Melissa. Created by David L. Smith in 1999, the Melissa virus was spread from one user to the next through email. The incriminating email typically featured a message about an expected document complete with an attachment. Unsuspecting users downloaded the attachment, automatically allowing the virus to send itself the same way to 50 others found in the user’s email list.


In the year 2000, a new computer virus known as ILOVEYOU was unleashed on Windows users. This virus came from the Philippines and was spread to users as an attachment on an email. The email subject read “ILOVEYOU” and the attachment was titled “LOVE-LETTER-FOR-YOU.txt.vbs”. Unfortunately, the “vbs” part of the attachment was hidden, making many users believe the attachment was a standard text document.

Netsky and Sasser

Eventually, computer viruses started to come into contact with one another on users machines. Later in the 2000s, the Netsky and Sasser viruses would remove other viruses found on a user’s computer before infecting it themselves. Both viruses were the creation of a German teenager.

Protect the security of your company with help from Nextrio. Our Tucson IT company can enhance your company by providing better security and teaching you how to avoid viruses. You can learn more by contacting us at (520) 519-6301.