Computer viruses, as appalling as they may seem, are a big nightmare that can disrupt your PC’s performance significantly. Apparently, they are designed to corrupt your innocent machine making it helpless and sick.

Getting marred by a computer virus has happened to most users in one way or the other. Often, it gives a mild inconvenience to users to clean up the machine and install an antivirus program; nonetheless, it can be a complete disaster in other cases, thereby turning your PC into a mess that no antivirus program can protect.

Here are five most dangerous computer viruses of all time:

1. ILOVEYOU 

Perhaps the most virulent computer virus ever created, the ILOVEYOU virus managed to wreck PCs all across the world. Infecting almost 10% of the world’s PCs connected to the Internet, the virus caused a total damage of around $10 billion. The virus apparently got transmitted via email with a subject line “ILOVEYOU,” which is a radical human emotion that no one can ignore. To make it even more alluring, the email contained an attachment that read something like this: Love-Letter-For-You.TXT.vbs. The moment someone opened the file, the virus emailed itself to the first 50 contacts available in the PC’s Windows address book.

2. Melissa 

Melissa became the breaking news on March 26, 1999, after hitting the new age of emailing. Built by David L, Melissa was spread in the form of an email attachment by the name “list.doc.” When a person clicked upon the attachment, the virus would find the Microsoft Outlook address book and email itself to the first 50 contacts on the list having a message “Here is that document you asked for…donot show anyone else.” Later on, FBI arrested David L and slapped him with a fine of $5000 for creating the wildest virus of its time.

https://www.yahoo.com/tech/5-most-dangerous-computer-viruses-of-all-time-113637274.html