IE Defender/Files Secure/MalwareBell/IE Antivirus Codec has been update, it installs files with semi-random filenames, composed from fragment words: x, c, s, edif, osys, ecol, ns, pd, gd, a, o, y
Files could look like: cosysnsy.dll, xecolgda.dll ...
and displays alert messages with popups:
Use SmitfraudFix to remove the infection.