A virus is a computer program that can copy itself and has a specific effect on a computer such as damaging programs and deleting files. This can have a disasterous effect on large computer systems like businesses as well as home computers.
With many computers connected to the internet and LANs (local area networks), the problems posed by virus’s has increased as they can spread far and quickly.
To stop them affecting your computer use antivirus software such as BitDefender or Kaspersky , these can cost up to $40 although there is some free software that can be found via downloads online. Of course people can also be vigilant about opening/viewing suspicious software and e-mails.
