IE Defender/Files Secure/MalwareBell/IE Antivirus/Total Secure 2009 Codec has been update, it installs a file with semi-random filename composed from a dictionary:
g, h, c, z, o, e
Possible filenames are:
gco.dll, gce.dll, gzo.dll, gze.dll, hco.dll, hce.dll, hzo.dll, hze.dll
It displays alert messages with popups that download WinDefender 2009:
It also drops Internet Shortcut on the desktop, Favorites, Start Menu: Cheap Pharmacy Online.url , Search Online.url, SMS Trap.url and VIP Casino.url
Use SmitfraudFix to remove the infection.