The most dangerous computer viruses

Friday 13 or Jerusalem

First discovered in Jerusalem in 1988. As soon as a Friday the 13th, it deleted all the programs running on the infected computer.

Prison inmates

Spanish virus appeared in 1993. Reaching the computer, it was hiding until January 5 and then activated, and overlaps the entire desktop with grid.

Falling letters

Was established in Germany in 1997. When a computer is infected, it turned all the letters on the monitor in the falling stage.

CIH or Chernobyl

This virus was created in Taiwan in 1998 by a student in just a week has spread and infected thousands of computers. Through the Internet, email, and drives the virus gets the computer, hiding inside other programs and in a particular point (April 26), the virus was activated erasing the hard drive and damaging the computer's hardware.

Melissa

For the first time the virus appeared in the United States. After infectioning, it found an address book program “MS Outlook”, and sends copies to the first 50 addresses in it. All this user wasn't suspected, though the distribution was made on his behalf. Infected messages have come with the following text: “The document you requested ... don't show  .”

I Love You, or chain letters

This romantic virus has been introduced in the Philippines in 2000. It acted like this: infected a computer, opened address book in the mail and sent on behalf of the computer's owner virus letters. Imagine you receive a letter from a friend. And with the name: “I love you”. Of course you'd like to open.

Nimda

The virus was established in China in 2001. The name of the virus is the word “admin”, only in reverse. He stole the “administrator rights” on the infected computer and made spam mails.

Bizex

The first ICQ-worm first appeared in 2004. How it happens: a message from a friend in ICQ – the link “see, how interesting”. You click and BING! The virus is on your computer. What is going on? Sends itself to all your ICQ contact list! And it teals your logins and passwords!

Conficker

The last in the list and the most recent, it appeared in November 2008. Attacks Windows. Principle: The worm disables Windows updates and blocks access to antivirus sites. Interesting fact: If your keyboard is Ukrainian – it won't harm you.

Next come the Trojans:

The first of them, “Baker.LGC”. It tries to get to the computer, hiding behind the false story about the accident involving Fernando Alonso, the Spanish Formula 1 driver.

The second Trojan, “Turkojan.I”, has one of the most attractive masks: it pretends to be a new episode of “The Simpsons.”

Trojan “Banbra.FXT” generates an email message on behalf of the Brazilian Federal Ministry and then empties peoples' bank accounts who believed in the rally.

Worm “AutoKitty.A”. Caught in the list, makes the Windows registry numerous modifications that prevent computer to do its work properly.

Trojan “PHilto.A”. Under the guise of a video of Paris Hilton installs a modules that show advertisements.

Malware “MeteorBot.A”. Under the guise of Superman grab information about your computer.

Trojan “PGPCoder.E”. Tries to encrypt all user data.

Trojan “Ransom.K.” “The most incompetent newbie” This Trojan encrypts documents on the infected computer, and then asks for $ 100 ransom for their decryption. But its creator, who probably doesn't have enough experience, made a mistake in programming, which allows users to release the files with a simple key combination.

How to avoid it?

1. Be careful with e-mail! Some viruses have just activated when you open the letter!

2. Regularly update antivirus database.

And which viruses affected your computer?