The Top 5 Most Expensive Viruses in History and Tips on Avoiding Them

Computer viruses often cause most of the problems in your PC that may require an expert help of a computer repair professional. While tamer viruses may only cause a system slow down, the most brutal ones can compromise your data, harm your PC, and even cause damage worth billions of dollars. As computers are meant for interconnecting, viruses can travel from one part of the world to another in less than seconds taking away all your data and systems files.

Top 5 Most Expensive Viruses in History

5. Code Red (2001): This virus that caused above $2 billion in damage was named after the soda its discoverers were drinking. The virus piled into the systems running the Microsoft ISS web server and subjugated faults in its indexing software. After infecting a computer, the virus started exploiting other systems in the network and eventually crept into the White House’s server. Strangely enough, just a month ago before the attack, Microsoft had issued a security bulletin advising their users to install a security patch in order to protect them from a potential attack of this sort.

4. Conficker (2007): This worm also exploited the weakness within Microsoft Windows OS and caused damage worth $9 billion. The worm was so advanced that it gained administrator access on infected systems and started infecting the networks of the French Navy; the British House of Commons; the U.K. Ministry of Defense; the Manchester City Council and police department.

3. ILOVEYOU (2000): Also referred to as the “Love Letter” virus, ILOVEYOU caused a whopping $15 billion in damage. The virus attacked email accounts of users and sent messages with “ILOVEYOU” as the subject line. Not only this, it also sent an attachment titled as “LOVE-LETTER-FOR-YOU.txt.vbs” and sent mails to the initial 50 email addresses stored in users’ Microsoft Outlook contact list.

2. SoBig (2003): The SoBig virus looked like a simple message from a friend, but acted like a Trojan that caused $37.1 billion worth of damage. The worm targeted systems with Windows OS via email account of the user. The malicious virus generated emails with subject lines such as “Thank you!” or “Re: Details,” and had an apparently harmless attachment. After infiltrating the computer, the SoBig virus sent copies of itself to contacts stored in user’s email account. Until today, Microsoft is offering a $250,000 reward to obtain any clue about the creator of the SoBig virus.

1. MyDoom (2004): As indicated by its name, MyDoom was one of the most devastating viruses in history that caused $38 billion in damage. It’s growth rate was much faster than any other worms discovered so far and it attacked computers with Microsoft Windows via user’s email accounts. The worm emerged in user’s email account with a subject line “Mail Delivery System,” “Test,” “Mail Transaction Failed” or “Error.” On opening the email, the virus attacked computer’s shared folders and sent mails to contacts stored in infected PC’s contact list.

How to Avoid Computer Viruses

It is a good idea to exercise caution while opening emails; else you might end up spending endless time, resources, and money to get rid of a worm on your system. Listed below are tips that can help you avoid a virus attack on your PC:

  • Install security updates and run virus scans regularly

From time to time, software firms keep releasing security updates that can prevent a malicious attack. So, you must keep updating your operating system, installed programs firewall, and anti-virus software as soon as such patches are released. You can even schedule regular, automatic virus scans, and security updates.

  • Open emails with caution

Never open an unexpected email even if you personally know the sender. These days, viruses and worms can infect your PC even when you don’t download any attachment. In case, you get an unexpected message along with an attachment, you should first call the sender and verify the authenticity of the message.

  • Don’t surf unknown websites

Though many computer users love to spend time on watching videos, read content from diverse websites, but do you know a simple click on a new website can severely infect your PC. However, it is possible to prevent such an attack by putting the security settings on your browser to high, and refraining from visiting the sites that make promises that look so good to be true. If your browser displays a warning message regarding a potentially dangerous website, you must immediately close the window.

By following the tips described here, you can avert a malicious attack and keep your data and PC completely secure and error free. In case, your system gets infected and you find it difficult to remove the virus, you can get in touch with an expert PC repair company like fixit99 and seek their expert help. A remote PC repair company such as can also help you removing malware and viruses, hijacked web browser, cleaning, optimizing, and protecting your PC.

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