Tackling Spyware is an ongoing task that sometimes seems to neverend. Firefox and IE have improved vastly in dealing with them but a lot still gets through.

SuperAntiSpyware is a surprisingly powerful Spyware detector and scanner that ensures that anything that you've downloaded is clear of any nasty software or spyware that might slow down or harm your system. The program can detect and remove spyware, trojans, dialers, worms, hijackers and rootkits. At the same time, it's very light on your CPU and won't slow it down while scanning so you can work comfortably at the same time. In addition, it has a special repair utility that tries to fix broken internet connections that have been damaged due to spyware or malware. It's not just a scanner though - it also protects in realtime to ensure that you are constantly protected before malware gets a chance to root itself onto your hard drive.
It also carried out a "pre-emptive" scan which scans 50 critical points of your system during system start-up and shutdown.

A powerful Spyware detector and scanner that will ensure that if anything has rooted itself onto your hard drive, you have a good chance of finding it.