Most software comes pre-loaded when you buy the computer, or the owner purchases new software and installs the new program on the computer.
So far so good, but there is also a class of software that is loaded on to your computer without your knowledge. This software or spyware often monitors activity on the computer and transmits the details to someone else. And apart from the privacy issues, spyware working in the background can cause a significant slowing down of your computer.
So why would someone want to go to the trouble of installing and running spyware on your personal computer, and how could they install the software on your computer without your knowledge.
To answer the second question first, spyware is often bundled with a free program that you are happy to install on your computer. Or it may be part of a attachment to an e-mail that appears as if it was sent by a friend. But whatever the source, the result is an unwanted program on your computer that surreptitiously monitors your activities and perhaps generates marketing pop up messages that reflect your preferences!
The clues that spyware is running on a computer include:
• a proliferation of pop-up ads
• a browser that takes you to sites other than those you type into the address box
• new and unexpected toolbars
• new and unexpected icons on the system tray at the bottom of your computer screen
• keys that don't work (for example, the "Tab" key that might not work when you try to move to the next field in a Web form)
• random error messages
• sluggish performance when opening programs or saving files
And to avoid being infected by spyware:
• Consider replacing your MS Explorer browser with the free Mozilla Firefox or Opera browser.
• Download free software only from sites you know and trust.
• Don't install any software without knowing exactly what it is.
• Don't click on any links within pop-up windows.
• Don't click on links in spam that claim to offer anti-spyware software.
• Install a personal firewall to stop uninvited users from accessing your computer.
If you think your computer might have spyware on it, experts advise that you take three steps:
Get an anti-spyware program from a vendor you know and trust. There are many free programs such as Adaware.
Set it to scan on a regular basis — at least once a week — and every time you start your computer, if possible.
And, delete any programs the anti-spyware program detects.
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