IE Defender/Files Secure/MalwareBell/IE Antivirus Codec has been update, it installs files with semi-random filenames, composed from fragment words: ap, od, ik, sa, do, unbe, gy, ps, xu
Files could look like: iksaps.dll, apunbeps.dll, apsagy.dll ...
and displays alert messages:
Use SmitfraudFix to remove the infection.