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Virus Computer (Age) Illness
The name virus sometimes leads to
wrong associations. A computer virus is nothing more than a computer
program. It is a computer program whiich was made to annoy you, not
help you like other useful programs. Viruses can do more harm then
just annoy you, they can delete your files, make your files publicly
available, make your system unusable, there is even a chance a virus
can harm your hardware. . These malicious programs are a big threat
because they have many means to spread themselves. They are resident
parasites, they stay in computers memory and are work in the background
while you are doing something else, say reading via e-mail, for example.
A virus can send to e-mail address it found in your address book or
it collected while you were surfing the web.
Regularly Update Antivirus Software!
Think of antivirus software as a service from an antivirus company not as a program. Antivirus needs to be updated very frequently in order to be able to protect you against new viruses, the ones which were made after your last antivirus update.
Viruses are usually an .exe type
of program, but they can attach themselves to other .exe programs, they
infect executable files. That makes another way of spreading
viruses, and this makes a virus much harder to control. There is a
type of viruses, which target Microsoft Office files. Office documents
can have programs, called macro programs. Those programs are simpler
then regular executable programs; they are born to help automate some
task in Office. Macro programs can also be made malicious by macro
viruses. Trojan horse is a name for a malicious program
(virus) which was made to look like some legitimate program. Recently,
there is another type: polymorphic viruses. A virus is called
polymorphic if it can change its code. This is not hard to detect a
virus by matching patterns of code, which is the most important detection
weapon antivirus software which is known as heuristics.
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