How do you find out if someone is using a keylogger to record your keystrokes and access your e-mail?

well, if the keylogger is keyprowler, you cant find it is the easiest to use on the market and it has most accurate keylogging engine, i use it to monitor 2 computers in my household and it has worked great for over 6 months. I have the pwords and usernames for myspace and facebook for my 2 kids, and i know exactly what they do everyday, it sends emails and takes screenshots, i highly reccomend it! http://www.keyprowler.com