A good security program will detect it.
How to detect a Keylogger :
* Check the task list by press ctrl+alt+del in windows. Examine all the tasks running, if you unsure of a task look it up on a search engine.
* Use the system configuration utility to determine which task are loaded at start-up (type "msconfig" in the run box to start).
* Run your antivirus checker, it's possible this will pick up the Keylogger on your system.
Scan your hard disk for the most recent files stored. Look at the contents of any files continually updating (these might be logs).
* Download a specific keylogger detector program, and see if it detects anything.
Run
Spybot S&D, this program checks for some known...