Spyware...it's probably watching you as you read this RIGHT NOW. You don't even know its in your machine, but it's there. Especially if you recognize any of the following names from clicking around your computer:

Alexa (through 5.0) ; Cydoor ; Flyswat ; Aureate (1.0, 2.0, and 3.0) ; Doubleclick ; Expedioware ; Comet Cursor (through 3.0) ; EzUla ; EverAd ; HotBar ; Transponder ; Webhancer ; OnFlow ; Gratisware ; TimeSink (through 5.0) ; Gator ; DSSAgent

These are just a few, but there are many more. So what can you do? You can try downloading Ad-aware. Its a free download that scans your memory, registry, and hard drives for this unwanted crap. Ad-aware then displays a list of detected spyware modules, Registry keys, files, and folders, and allows you to remove them from your system selectively.