Not if you have a secure means of input in your OS. OSX does, for instance, you can turn it on in the Terminal application and no loggers will see what you type.
Unless they install as a kernel extension, then you're screwed. But that requires a password.
of course. But now we're talking something significantly more complicated than a keylogger, and more fragile as it probably relies on glitchy behavior.
Unless they install as a kernel extension, then you're screwed. But that requires a password.