The process of transferring information from your computer to another computer through the Internet. Every time you send e-mail to someone you are uploading it to other servers. This is the unique identifier that you use to identify yourself on a computer. Chances are good that you typed your User ID when you logged onto the Internet - unless it was automatically stored in you computer. A virus can wipe out information on your computer and create major havoc.
Viruses originate from malicious people who intentionally want to cause harm.
You can unintentionally download virus from a web site or get it from a disk that someone has lent you. There are virus-checking programs, but there are new viruses popping up every day. The best defense against a virus is to be very careful not to download programs or data from a site you're not familiar with. The program that allows you to surf the web. You probably used your Web Browser to locate this page.