The hjt logfile seems OK, but there is new rogue av malware that sometimes installs on:
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Start Page =
-http://apod.nasa.gov/apod/astropix.html
Do you get popups with fake av or do you get redirected to fake sites?
Maybe essexboy may have a cleansing routine for you, a run with TDSSKiller.exe and OTL log analysis, wait untill he appears,
polonus