Tips and Tricks

Bitdefender’s Pick. Computer Security Day Recalls Infamous Virus to Caution Users

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Have you changed your passwords lately? How about creating that backup you’ve been putting off? Computer Security Day on November 30 is a special date established to remind us how important it is to keep our computers safe.

Computer Security Day was created to raise awareness of cyber security issues after the devastating effects of the Jerusalem virus. A DOS virus first detected in Jerusalem in October 1987, this piece of malware caused a worldwide epidemic for the first time in 1988. It was engineered to go off every Friday the 13th, every year except 1987. It destroyed all executable files on infected computers.

Almost 26 years have passed since the first incident caused by the Jerusalem virus. File-destroying malware has become a rarity nowadays, as only 0.33% of the threats we detect try to infect or delete operating system files. New malware is more subtle, silent and unobtrusive, but extremely effective. Protecting against these silent threats is the new challenge.

Computer security breaches caused worldwide damages worth as much as $220 billion in 2013, according to some estimates.

On Computer Security Day computer users are reminded of a few simple measures they can take to minimize risk of infection. For example: update your passwords from time to time; mark emails from unknown senders as spam; backup your data; delete unneeded files; and make sure you safeguard your computer using anti-malware programs.

About the author


The meaning of Bitdefender’s mascot, the Dacian Draco, an ancient symbol that depicts a mythical animal with a wolf’s head and a dragon’s body, is “to watch” and to “guard with a sharp eye.” Like our mascot, we are committed to using Bitdefender Labs, our world-class research team, to vigilantly find and eradicate threats for our customers, and to use our platform for the larger good.


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  • I searched everywhere to find a new antivirus program. Then I found you Bitdefender. What a relief you have been for me. I am extremely pleased with your product. I have had Total Security for over 2 years now. It is very easy to use and I PAY attention what it tells me to do.
    Thanks so much for your products and protection.
    Happy Holidays to all of you who make us safe in the crazy world of Hackers out there!

  • Computers are deliberately made unsafe for a number of reasons. Not least of which is money. From Government Spying to Microsoft’s planned obsolescence, computers are at the mercy of anyone who can write a program! It would be a SIMPLE matter to make computers safe and controllable by their owners, but why let the people have any power! It goes against the entire paradigm of Planet Earth!