downloader.agent.11.Q
AVG recognized downloader.agent.11.Q (trojan), but couldn't exclude it. It wiped my hompage setting, but did not replace it. Virus warnings kept popping up on internet explorer. Deleting appuf32.exe did not remedy the popups. "Hijack this" showed a process containing windb.exe to be running. Deleting this entry with "hijack this" solved the problem.