Can a keylogger be detected?
Here’s where things get scary: 80% of software keyloggers are not detectable by firewalls or antivirus programs, and their popularity with businesses makes them incredibly easy to find and download. In fact, you can go download a keylogger right this moment.
How do I tell if I have a keylogger?
Another simple thing to check is for a small hardware device connected between the end of the keyboard cable and the keyboard input on the computer. If your computer seems to lag when you are typing things, it could be an indication of a keylogger, although many other scenarios can contribute to this symptom as well.