KL Detector is very easy to use. You only have to run it and it will scan your computer. In some minutes, it will tell you if there is any keylogger running on your system.
You'll be given a report and you'll decide whether to remove it or not.
The program is very light and can be run from a pendrive, so you can use it on any computer to check it previously.
A good way to be sure you are not being spied.