I’m excited!! I’ve been reading the article on Spyware in Wikipedia. It’s excellent. If you want in depth knowledge about what malware is and does, read it.
The photo on the page shows a browser overloaded with toolbars. If you have unwanted toolbars on your browser window then that is one indication you have spyware. See here how to get rid of it.
Or if you live in Calgary, Ducktoes can help.