I'm not sure what it is you are asking here.
Legitimate keylogging software is installed for a reason and I'm not prepared to get into a discussion on the ways of bypassing, disabling or otherwise altering their function.
If you have been 'infected' with one or more of the keylogging trojans that are currently doing the rounds, that's a different story.
Perhaps you could supply some detail of the nature of the problem, your operating system, antivirus software and when you noticed the symptoms. That could help one of us formulate some kind of answer for you.