What is Spyware?  

Any software that covertly gathers user information through the user's Internet connection without his or her knowledge, usually for advertising purposes. Spyware applications are typically bundled as a hidden component of freeware or shareware programs that can be downloaded from the Internet; however, it should be noted that the majority of shareware and freeware applications do not come with spyware. Once installed, the spyware monitors user activity on the Internet and transmits that information in the background to someone else. Spyware can also gather information about e-mail addresses and even passwords and credit card numbers.

Basic spyware
Spyware is often downloaded onto your PC when you download other free software. When you see a license agreement for any software you download from the internet read it carefully.

Often buried in the licence agreement will be a disclaimer saying that information about you and your browsing habits will be sent to the company's website.

The information collected about you is usually for advertising purposes but spyware can scan files on your hard drive, listen in on other applications like chat programs, read cookies - the list is endless...

Adware and malware
Adware is a form of spyware which installs secret advertising software on your computer. These generate on-screen adverts (often pop-ups) which can be really annoying!

The worst forms of adware 'hijack' links in web pages. So, instead of taking you to the correct website they take you to a different site - who have often paid the adware makers.

Malware is another form of spyware. It's short for malicious software and is often designed to cause damage to your computer system just like a virus does.