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Is it possible to detect keylogger?

Is there anyway to know if my keystroke is being captured by some keylogger or so? I have try run antivirus and all anti spyware adware malware..I think the key logger is invisible.

keylogger is a spyware program. it caches your key strokes in the computer. the best way surfing the website when you use public computer, try to use virtual keyboard to key in you password. it will helps. for more information you can check
http://www.nokeyin.com
they provide free online virtual keyboard for surfing the site . pretty good

Types of keyloggers
As mentioned, keyloggers are applications that monitor a user's keystrokes and then send this information back to the malicious user. This can happen via email or to a malicious user's server somewhere on the Internet. These logs can then be used to collect email and online banking usernames and passwords from unsuspecting users or even capture source code being developed in software firms.

While keyloggers have been around for a long time, the growth of spyware over the last few years means they warrant renewed attention. In particular, this is due to the relative ease at which a computer can become infected -- a user simply has to visit the wrong website to become infected.

Keyloggers can be one of three types:

1. Hardware Keyloggers. These are small inline devices placed between the keyboard and the computer. Because of their size they can often go undetected for long periods of time -- however, they of course require physical access to the machine. These hardware devices have the power to capture hundreds of keystrokes including banking and email username and passwords.
2. Software using a hooking mechanism. This type logging is accomplished by using the Windows function SetWindowsHookEx() that monitors all keystrokes. The spyware will typically come packaged as an executable file that initiates the hook function, plus a DLL file to handle the logging functions. An application that calls SetWindowsHookEx() is capable of capturing even autocomplete passwords.
3. Kernel/driver keyloggers. This type of keylogger is at the kernel level and receives data directly from the input device (typically, a keyboard). It replaces the core software for interpreting keystrokes. It can be programmed to be virtually undetectable by taking advantage of the fact that it is executed on boot, before any user-level applications start. Since the program runs at the kernel level, one disadvantage to this approach it that it fails to capture autocomplete passwords, as this information is passed in the application layer.