A Keylogger is spyware that records keystrokes entered by the user and much more. Keyloggers can be hardware or software. Hardware keyloggers are embedded into the internal PC or a plug in is positioned between the CPU and keyboard cable. Software loggers are much more common and easier to install. They work behind the scenes while the computer operates normally. It is worth pointing out that keyloggers are not always illegal. Many companies will use commercial software to tr