Computer Viruses_ Trojan Horse and Worms

							Computer viruses can easily spread from   one computer to another by
attaching itself to programs and files.   Do you know what greatly
contributes to the spread of virus into   you computer and to other
computers? It is the action done by the   user.

 Viruses come in executable files. Meaning, it will not really affect
your computer unless you run or open the malicious program. Oftentimes,
because the user is not aware of malicious files and programs, they
initiate it and this causes the activation within the computer.

 There are a lot of anti-virus programs you can choose from which will
enable you to protect your computer. Yet, it is still important to be
aware about viruses because this will ensure that you can really avoid
those malicious programs and files.

 It is not enough to just know what a virus is. More importantly, you
have to be aware of the other common threats that usually affect
computers. Among the most common viruses are worms and Trojan horse. What
exactly are these?

 Worm is an algorithm which can cause damage your computer. The
difference of worm among other computer threats is that is capable of
spreading through your computer even without running or opening the
program. It spreads from one computer to another through various methods
of file transfer. What makes it worse is the fact that worms are often
capable of replicating itself within your system.

 On the other hand, Trojan horse is also another destructive program
which can be quite tricky. Worms are capable of appearing in disguise.
People who receive Trojan horse are often fooled into opening the file
because it appears like a useful software or a program file from a
reliable source. Trojan horse can do alterations to your computer like
changing the desktop settings or adding unnecessary icons. In other
cases, it causes more serious damage like deleting files in the hard
drive.

 If you think these two are already serious threats to your computer,
there's something else that is much worse. That is, if virus, worm and
Trojan horse were put together in one seriously destructive threat which
is also called as the Blended Threat. Blended threats are more
sophisticated and more complicated to create. At the same time, it also
has a more detrimental effect. It can spread through the entire computer
and even to networks which damages the files and programs and can even
sacrifice the safety of confidential information within the system. Even
worse, blended threats do not need to be activated by the user before it
could attack your system, destroying the computer, the network and
programs.

 Keep yourself aware of these things and it will strengthen your defense
against the viruses that may destroy your computer.