Hijackthis

Homepage: http://sourceforge.net/projects/hjt/

Download link: http://sourceforge.net/projects/hjt/

Operating Systems: Windows 95, 98, ME, NT, 2k, XP,Vista

Description: Hijackthis can finda all software that runs automatically at startup . i can check  registry, lsp, ini files, start up folder and browser settings. Very fast and efficient but also dangerous unless you really know what you’re doing.