How Viruses Contaminate Your Computer

How Viruses Contaminate Your Computer

How Viruses Contaminate Your Computer
Viruses are little bits of​ software that normally have a​ negative impact on​ our computers when they are activated .​
Usually viruses are attached onto other software programs (games,​ disk utilities,​ office documents/Macros,​ screen-savers),​ and are activated when these normally harmless programs are started.
A virus is​ inactive until the​ infected program is​ run or​ an​ infected boot record on​ a​ floppy/CD is​ read .​
When the​ virus is​ activated it​ loads into your computer's memory where it​ can perform its nasty job or​ spread itself to​ other programs on​ your system or​ computers in​ your network.
Floppy disks used in​ an​ infected system (or CD-Roms/DVDs burned on​ an​ infected system) can then carry the​ virus to​ another machine .​
Programs downloaded from USENET,​ or​ file-sharing programs (Kazaa,​ Morpheus,​ Limewire etc.) can also spread a​ virus .​
More frequently now,​ email is​ also becoming a​ favourite way to​ spread viruses,​ Trojan horses and especially internet worms.
It should be made clear,​ that USENET and file-sharing programs do not create viruses or​ infected files in​ any way .​
It is​ certain anti-social people who create viruses,​ and then use these services to​ spread the​ infected files to​ other users on​ the​ system.
This is​ very similar to​ cars and highways in​ that Ford,​ Toyota or​ the​ highway makers do not cause traffic accidents,​ it​ is​ the​ idiot who got drunk and then drove who causes a​ 14 car pileup .​
Of course if​ there weren't cars or​ highways there wouldn't be an​ accident.. .​
then again,​ the​ idiot would still be getting smashed and driving his horse-carriage into the​ store window.
When you get a​ virus on​ your computer,​ it​ can erase everything that you have on​ your hard drive .​
Each virus is​ different - some of​ them come up as​ strange messages on​ your screen,​ while others just work at​ eroding the​ files on​ the​ computer .​
a​ virus just doesn't appear in​ your computer - you have to​ put them there,​ usually by running program from the​ Internet that contain viruses .​
They sometimes come from attachments in​ emails .​
It is​ possible that an​ email from a​ friend could contain a​ virus if​ that person's computer is​ infected .​
With anti-virus software installed on​ your computer,​ this will tell you whether or​ not it​ is​ safe to​ open the​ email with a​ message such as​ No virus detected in​ incoming mail:
When you do get a​ virus through programs or​ mail,​ it​ hides in​ your computer and when you save data in​ the​ computer,​ you also save the​ virus .​
Then it​ starts to​ infect all the​ other files in​ your computer .​
When you send files to​ a​ friend or​ co-worker,​ you also send the​ virus to​ his/her computer .​
After a​ while the​ virus starts to​ crowd the​ data in​ your files and causes major problems with the​ system,​ such that you may not even be able to​ open important documents or​ you may not be able to​ open any of​ the​ programs on​ the​ computer .​
The virus won't affect the​ memory of​ your computer,​ but it​ will affect any disks that you use to​ save your work.

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