Identify and remove unsafe system processes that are running in background without you knowing it. Comodo Cleaning Essentials is a set of computer security tools designed to identify and remove malware and unsafe processes from infected windows based computers. It is portable so does not need installation and can be run directly from removable media such as USB drive. Best security tool for users of any experience level.
HiJack This program can do it as well but here is another cool program which will reveal all the hidden badware, goodware or whatever is there in PC and will leave decision to you for what to do with them. Its a hidden threat detector, rootkit detector, drivers scanner, files scanner, process scanner, SSDT scanner, stealth objects scanner and shadow SSDT scanner.