Kaspersky, AVG and Spybot search and destroy
Well, I just Googled around a little and the only soloution I'm familiar with is Ad Aware (Lavasoft).
Open task manager and end these processes: AntiSpyCheck.exe, asc_2.1_setup[1].exe, AntiSpyCheck 2.1.exe, then download Ad Aware SE Personal and run a full system scan - it usually picks up stuff that programs like Spybot don't. This most likely
won't solve the problem entirely, because some comments mention the system tray icon still being there but it's a step in the right direction.