1.5 Safe surfing
1.5.1 What is a computer virus?
The Internet can be a fun place to explore, but if you don't want to suffer serious computer damage you need to avoid computer viruses.
Just like a medical virus a computer virus can cause all sorts of different symptoms on your PC. A virus is a little computer program that has a built-in ability to copy itself from one computer to another. It does this by e-mailing itself, or hiding in another computer program.
When infecting a PC a virus can delete and destroy your files and it can also use your e-mail and its address book to deliver itself to your friends and colleagues.
Use the following rules to keep your computer virus free.
Install (and keep up-to-date) some anti-virus software.
Install (and keep up-to-date) a personal firewall.
Get the latest patches and updates for your operating system.
Make back-ups of important files.
Never automatically open e-mail attachments.
Download or purchase programs from trusted, reputable sources.