What is a Computer Virus?
A computer virus is a malware program that, when executed, replicates by inserting copies of itself (possibly modified) into other computer programs, data files, or the boot sector of the hard drive; when this replication succeeds, the affected areas are then said to be "infected". Viruses often perform some type of harmful activity on infected hosts, such as stealing hard disk space or CPU time, accessing private information, corrupting data, displaying political or humorous messages on the user's screen, spamming their contacts, logging their keystrokes, or even rendering the computer useless. However, not all viruses carry a destructive payload or attempt to hide themselves—the defining characteristic of viruses is that they are self-replicating computer programs which install themselves without user consent.
Computer viruses currently cause billions of dollars' worth of economic damage each year, due to causing systems failure, wasting computer resources, corrupting data, increasing maintenance costs, etc. In response, free, open-source antivirus tools have been developed, and a multi-billion dollar industry of antivirus software vendors has cropped up, selling virus protection to users of various operating systems of which Windows is often the most victimized, partially due to its extreme popularity.[citation needed] No currently existing antivirus software is able to catch all computer viruses (especially new ones); computer security researchers are actively searching for new ways to enable antivirus solutions to more effectively detect emerging viruses, before they have already become widely distributed.
The
first polymorphic virus of the world was Tequila which was released in
1991. Polymorphic viruses were the ones which used to change their
appearances with each encounter with a virus infection. Ultimately with
the release of this virus, the life of virus scanners got very difficult
as they were not able to identify this virus at the majority period of
time.
One of the most powerful virus in the world was Melissa Virus which
was released in March 1999. This virus was so dangerous and impactful
that it forced the big names in computer worlds like Microsoft to stop
their email systems untill unless the virus is removed properly from the
computer and system. The virus was a mass mailing macro virus which
according to a report infected the 20% systems all across the world.
- See more at: http://quedio.com/best-computer-facts-to-know-amazing-4042.html#sthash.S1W9lRW4.dpuf
Facts about Virus :
- The first polymorphic virus of the world was Tequila which was released in 1991. Polymorphic viruses were the ones which used to change their appearances with each encounter with a virus infection. Ultimately with the release of this virus, the life of virus scanners got very difficult as they were not able to identify this virus at the majority period of time.
- One of the most powerful virus in the world was Melissa Virus which was released in March 1999. This virus was so dangerous and impactful that it forced the big names in computer worlds like Microsoft to stop their email systems untill unless the virus is removed properly from the computer and system. The virus was a mass mailing macro virus which according to a report infected the 20% systems all across the world.
- Almost very few people know that world’s first known computer virus was a computer program itself which was “Elk Cloner”. Richard Skentra was the one who wrote this program in 1981. This computer program virus started when it attached itself with an Apple DOS 3.3 operating system and it started spreading through floppy disk. This program was written in 1982 by Richard when he was only 15 years old.
- Another computer virus fact is that back in 2004 in January, a computer virus worm named Mydoom infected more than quarter million computers all across the world in a single day.
- Michelangelo was one of the most dangerous and worst MS-DOS virus which way back in 1991 started attacking the boot sector of hard drive and floppy disk you inserts in your PC. For some time this virus spreads very quietly and on March 6, the virus was activated and it started destroying the data of over 5 million computers which were infected by this virus.
- There are many facts about you were unaware of before this post like the first famous web browser was released back in 1993 and was named Mosaic. The credits of popularizing the web browsers has always gone to Mosaic Web browser and you can also call it NCSA Mosaic. The support and development of this browser was stopped in January 7, 1997.
- Sweden is the country which has the highest percentage of internet users and according to a report almost 75% of citizens of Sweden uses internet.
- “Rother J” was the world’s first computer virus which actually came into notice outside the computer labs and due to this it was also termed as the “into the wild” by the computer geeks.
- We all are active on internet but do you know that how many people are on the internet? There are over 1,567,872,900 people on the internet and taking this topic further do you know there are over 1.09 billion instant messaging and social accounts all across the world, which will be increasing with the time as the internet has been a very important part of our life and our lives are depending on it.
- The house of the world’s richest man Mr. Bill Gates was designed by using a Macintosh Computer.
- The first polymorphic virus of the world was Tequila which was released in 1991. Polymorphic viruses were the ones which used to change their appearances with each encounter with a virus infection. Ultimately with the release of this virus, the life of virus scanners got very difficult as they were not able to identify this virus at the majority period of time. One of the most powerful virus in the world was Melissa Virus which was released in March 1999. This virus was so dangerous and impactful that it forced the big names in computer worlds like Microsoft to stop their email systems untill unless the virus is removed properly from the computer and system. The virus was a mass mailing macro virus which according to a report infected the 20% systems all across the world.
- The first polymorphic virus of the world was Tequila which was released in 1991. Polymorphic viruses were the ones which used to change their appearances with each encounter with a virus infection. Ultimately with the release of this virus, the life of virus scanners got very difficult as they were not able to identify this virus at the majority period of time. One of the most powerful virus in the world was Melissa Virus which was released in March 1999. This virus was so dangerous and impactful that it forced the big names in computer worlds like Microsoft to stop their email systems untill unless the virus is removed properly from the computer and system. The virus was a mass mailing macro virus which according to a report infected the 20% systems all across the world.
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