There exist Softwares designed such a way that every keystroke on the computer is recorded. Such softwares are often used by firms to monitor the office computer usage by its staff. Such softwares are well known for their spy nature and is difficult to detect for a normal computer user.
Those programs record everything.. which can be your password or your credit card number. Here is a simple trick to protect them.
Enter the password in parts. Suppose your password is 'blackwidow'. Enter some part like ' bla..' and the press some where on the window so that the password field is not highlighted. Type in some random words on the window. These words will be recorded by the logging program but will not appear anywhere on the screen. Now click the password field and enter some more..' ckwido...' . Repeat the other thing again.. Click on the screen and enter random words. Now complete the password ' .. w ' . That way you can cheat the program . So Your password remains protected.
Usually all keyborad logging programs record the title of the window you are in. So shifting windows and typing in words in some textfile or so will not work. You will have to follow as above........click somewhere on the screen and enter random words.
Good Luck!
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[ Thanks to my friend Jerry Joseph for this tip. He too is a inspired blogger at www.jjsoftware.blogspot.com ]