Have you ever wondered that everything you typed on your computer at the moment you boot into your Operating System could be saved in a log file and sent over to third party without your consent? Well this is no longer a false alarm as such cases had indeed happen since who know when.
Try and read the article on the link below for a complete removal of such key logger, if there is one.
Link : http://forum.cheatengine.org/viewtopic.php?t=193064