Back to software again - I would highly recommend you install Spyware Blaster on your system. This keeps any new spyware from being installed. Very easy to use and works. Then I would also install Search and Destroy, which searches your entire computer for spyware tracks- also easy to use, but I recommend you read the tutorial. It is better than Ad-Aware.

Oh, and did I mention? Both are free!

So if you have Tune-Up installed and the above two programs, have your virus definitions up to date and are running Zone Alarm (also a freebie), then you should be well protected from the bad guys.