How to tell if your computer is infected with spyware

Published 12/05/2004 23:10   |    Updated 23/04/2008 14:07

How do I tell if my computer is infected with spyware?

Spyware is a type of software that is installed on your computer to watch and record your activity. Some types of spyware record your keystrokes and information that you type into websites or other programs and then use that information for targeted advertising or identity theft. These programs can be installed on your computer in many ways but often they are hidden inside of software such as free games, screen savers, or animated cursors.


Here are some signs that your computer might be infected with spyware:

  • You notice new toolbars, links, or favourites that you did not intentionally add to your web browser.
  • Your home page, mouse pointer, or search program changes unexpectedly.
  • You type the address of a specific website into your web browser, but you are taken to a completely unrelated website.
  • You see pop-up ads, even if your computer is not connected to the Internet.
  • Your computer suddenly starts running more slowly that it usually does. Not all computer performance problems are caused by spyware, of course, but spyware can cause a noticeable change in processing speed.

Sometimes your computer will show no symptoms, even if a spyware program is running. To help protect your privacy and your computer, we recommend that you run Windows Defender or another antispyware program at all times. If you suspect your computer has been infected with spyware or viruses, you can scan your computer online with the external link* Windows Live OneCare safety scanner.


*Note: BT cannot be held responsible for the content or advice given by external websites, nor the result of misconfiguration arising from such advice.



See also: How do I tell if my computer has a virus?


and Spyware: frequently asked questions


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