Yep, you've picked up some spyware. Free utilities like Ad-Aware or Spybot: Search and Destroy do a fair job of cleaning off most of these vermin. It has been suggested, however, that these programs clean out the opposition while installing their own snoop-bots. Far and away the best utility is Pest Patrol. It's not free, but it does an outstanding job. Running it every few days will eradicate the sort of shit that sticks to your cyber-shoes. Especially if you frequent "certain areas" of webtown. I also reccomend the CyberScrub utility. It cleans system traces and erases files beyond hardware recovery. Do a search, these utilites are easy to find.