Top 10 Worst Computer Viruses

The Top Ten

This virus has infected over 10 million computers since 2000. And what happened you may ask. You get a file named "LOVELETTER". You're computer gets infected. Pretty bad. It doesn't exist anymore. But people have reported it's still out there. If you get a file titled "LOVELETTER". Do not open it. Or you're infected

Thank GOD its not here. But legend has it that people have reported its still out there

If it were still here, this would be a nightmare!

10 Billion$ of damage... Damn

2 Sasser

Sasser the assassin!

3 CryptoLocker

Imagine someone barfing all over your xbox, then asking for $500 so they can clean it up LIGHTLY, and then does it again the next day.
That's CryptoLocker for you.

Ransomware in general is the worst - it honestly makes me vie for the days of fake antivirus programs.

Worst virus ever. It encrypts your computer's data, and demands a ransom of a high price to get it back. And even if you manage to delete the virus from Safe Mode or something, your files WILL STILL BE ENCRYPTED.

4 Code Red
5 CIH Virus
6 Morris Worm

This virus spreaded so quickly that it had 10% of computer shut down at the time! It also took about 6 days to be removed from a computer. The way it worked was that it would replicate itself infinitly and move to other computers.

7 Killbot

This is incredibly dangerous, once is installed, flashes images, and makes everything to make the user commit suicide!

This virus may be rare, but still very dangerous, should be higher.

This one is actually terrifying... I don't want this on my computer...

Some people DIED cause of this virus, how isn't this higher?!

8 BonziBuddy
9 Metropolitan Police Virus

This virus just the worst. After you watch something disgusting, listen to music on websites, or play violent games. You get a pop up saying your personal computer has been blocked, and they show screenshots and make you wonder "Wow. My actions can be watched and taken to the police." And it asks you to pay a fine of 200$ (Correct me if I'm wrong) and after it popped up. When you try to log into your computer. You get the virus page instead of the info. If you get this page, don't listen to it. It's just made by a homeless guy who tries to get money from you.

I accidentally clicked on an image, which was normal fanart of Chica, and I payed the fine.



Kills your computer, forever displaying a Nyan Cat...

That was a great stream

The Contenders
11 You Are an Idiot
12 Qvo6
13 System32

WORST virus on this list, look up how to get rid of it as it is infecting your Windows computer right now... Undetectable by antivirus.

14 PGPCoder
15 Stuxnet

Worst virus ever

16 Zeus
17 Spora
18 Melissa

It will change your search engine and slow your computer down.

20 The Flame Worm

'The most complex malware ever found.' Why is it not higher?

It started out for a good purpose but ended up turning against the creators, its code is the longest of any malware with 20megabytes of data


So annoying. You get it by downloading something off of a fake website. It disguises its self as a search engine and will cause ads to be thrown at you all the time when you're looking at pages and things like that. What's more is that it is a spyware thing and automatically changes to the default search engine for every one of your browsers. It tracks everything you type and really likes personal information.

My old computer got this trovi virus. It is so annoying! If you have it, sigh...

I dislike trovi,

22 CIH/Chernobyl/Spacefiller

An old virus that could destroy Windows and the first few sectors (Master Boot Record or Master File Table). Some certain variants can even destroy the BIOS and/or CMOS by overwriting it with random bytes of data - essentially making the computer a paperweight. Patched in BIOSes newer than 2001/2002, this virus is ancient by today's standards. The virus first emerged in 1998 and caused around $1 Billion US in damages, thought to infect over 60 Million machines worldwide. No one needs to worry about this virus these days, considering the fact that it only infects Windows 9x OSes (95, 98/98SE, ME), and is patched in any motherboard manufactured past 2002.

23 Pikachu Virus

Shuts down your computer and ASKS you if you want to delete all your stuff

24 Mydoom

Mydoom is most dangerous worm in all computer viruses. Mydoom was first sighted on January 26, 2004.

I wonder why this isn't higher on the list...

25 Cursor Mania
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