IE Defender/Files Secure/MalwareBell Codec has been update, it installs files with semi-random filenames, composed from fragment words: t, p, z, o, so, onsa, kr, pl, dnr, u, y, e
Files could look like: ponsadnru.dll, ponsaple.dll, tsoply.dll, zople.dll...
and displays alert messages:
Use SmitfraudFix to remove the infection.