I use Firefox, Windows Defender, SpyBot, Ad-Aware, and AVG.
First item that popped up was bestantispywaresecurityscan.com... I don't think I clicked on anything more, but after that I would get blank popup windows and error messages for RealPlay.exe, iedw.exe. I think AVG was stopping the popups from loading. I also got notices that Rundll was trying to load tafivefi.dll, zukuyepu.dll and a couple other dll files.
I ran multiple AVG, SpyBot and Ad-Aware scans. They found a number of trojan horses: vundo, adload, misc. agents and generic 12s, and PSW OnlineGames.BOZO. SpyBot also found Virtumonde and Virtumonde.prx.
After I scan and fix the infections, the pc works fine until I start a browser. Even when running Firefox, IE windows try to load. I found MS Juan and MS Track System entries in the registry, but they keep coming back.
Any help would be appreciated. Thanks.
Logfile of Trend Micro HijackThis v2.0.2 attached.