What is Computer Security?
Computer security is really just the steps that you take to secure the information and software on your computer. You need to secure information so that no-one can steal it, alter it or erase it – and you need to secure the software so that no-one can alter the way that software works (or use it to steal, alter or erase your information).
Computer security threats include:
- Viruses, Trojan Horses and Worms - All three are examples of software, often called "malware" (short for "malicious software"), that is designed to create havoc by crippling your computer or destroying your information. (There is a great primer on this issue here.)
- Spyware - This is a general term for software that performs some hidden activity, generally without your consent. Those activities may include displaying advertising, collecting personal information, or changing the configuration of your computer. Spyware is in the same category as other malware, such as worms and viruses, but it doesn't behave the same. Spyware doesn't usually do actual damage to your computer, other than wrecking its performance, or use your address book to spread to other computers. (See this link for more.)
- Adware - This is a specific type of spyware. Typical adware may display unwanted pop-up advertising, change your default web page without your consent, add new toolbars that you can't delete, and dramatically slow your computer or cause it to crash. You'll find great tips here.
Next: Learn about the built-in security tools that come with your computer.
