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how viruses attack windows os? why viruses does not attack linus os?

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Viruses attack windows because most computers run windows. There are very few virus writers out there. Most viruses come from fools pressing buttons on virus creating tool kits (script kiddies)
There are linux viruses (and Mac viruses) but since script kiddies get their thrills from the number of systems they infect, the low usage of Linux and Macs mean they are not worth attacking.
Some virus writers attack us (the Windows users) because we are much easier targets than Microsoft its self.
Most virus writers are lazy and go for the easy target (us)

Viruses commonly attacks Windows Operating system because these malicious software attach itself as a part of the startup program of Windows. Thus, the virus continues to infect the computer if it has no antivirus software installed. Linux OS cannot be infected by viruses because it is also an application itself and not similar to windows that sets startup programs. In this way, viruses could not run and spread itself automatically.

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  • InfoSafety
    It's all about the money. Infected computers are used as zombies to attack and enlist other computers to, among other things, send phishing spam for identity theft. This is big business. No longer is malware writing the exclusive domain of "hobbyists." Those after the money go after the biggest target, which is Windows. Craig Herberg
    75 pointsBadges:
  • Bobkberg
    As longshanks and InfoSafety already pointed out, it's a matter of volume of opportunity. However, I'm guessing that you may be asking a different question. Most viruses (virii?) have to be written to specifically take advantage of some weakness in the underlying O/S or run-time environment. This tends to make them specific to a given platform. However, when there is a cross-platform functionality on a given set of systems (Like Microsoft Word for PC and Microsoft Word for Macintosh), then the macro viruses that can infect a word document (like Melissa, if memory serves) will infect any system that runs Word. Similarly, there has been at least proof-of-concept viruses for PDF files (although that required Adobe Acrobat standard or better to propagate, since Adobe Acrobat Reader can't propagate anything), and for .GIF files as I recall. It is a computer industry axiom that any complex system contains bugs. The virus writers typically use a combination of knowledge of those vulnerabilities, and weakness of human nature to get the process going. Remember the "Anna Kournikova" virus a while back that promised naked pictures of her - no pictures, just a nasty virus. Hope that helps, Bob
    1,070 pointsBadges:
  • Scribble
    that answer is simple the reason windows is more prone to virus infection than linux is there is far less people who know how to use linux than there are with windows and what longshanks said is true the peolpe creating viruses are mostly script kiddies who use a program to do it for them and somehow get it into their heads thay are now computer guru once the virus has been created by the program. Where and i say it the real skill is with the programer who built the app for what ever reason he created it.
    165 pointsBadges:
  • Markempee
    I think that computer viruses mostly attack Windows OS because this type of OS is embedded to the computer system. The computer virus basically attach itself the the operating system and set itself to run automatically as the Operating System starts.
    2,130 pointsBadges:
  • James Murray
    I think it would be a mistake to assume that viruses do not attack linux or Mac. All systems have the potential for attack. Because viruses need to be difficult to identify, the footprint of the virus needs to be very small. Building a virus that can talk to every system would require a bigger footprint. So each virus is designed to be as small as possible which means focused on a single weakness in a single operating system. Because there are so many windows machines compared to apple or Linux there are more people familiar with Windows. There are also more people discussing the weaknesses of Windows. Finally it makes sense that writing a windows virus may be more satisfying because a good window virus will affect more people than a good Mac or Linux environment. So say you have 1000 experts at hacking windows systems and 10 experts at hacking Linux systems vs 1 expert at hacking Mac systems... the 1000 Windows experts are going to be hundreds of times more effective than the other experts just because there are so many more of them. So a linux virus can't attack a Windows virus because the risk would be greater that it would be discovered, so viruses are very specific... The how... well that's infinite depending on the number of weaknesses that a hacker chooses to write to.
    1,795 pointsBadges:

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