This section is about adware or spyware.. not them grey window popups
You will know when you have either because you will notice a change to your operating system .. this could be your homepage has changed and you can't get rid of it or an Internet Explorer toolbar has suddenly installed out of no-where!
Spyware is any application that tracks your online behavior without your knowledge or consent.
Spyware infects 9 out of 10 PCs connected to the Internet and has eclipsed viruses as the #1 threat to online privacy.
Spyware comes in many forms including adware, Trojans, system monitors, home page hijackers, keyloggers and more.
In my opinion the best program to get rid of adware is to use ADAWARE which can be downloaded free here.
For spyware removal I'd use SPYBOT or SPYSWEEPER .. these can sometimes take a while longer to scan but pick up more little shits! <G>
If you have AOL9 installed, you might find that the AOL Spyware Protection might conflict with other programs so uninstall this first!