If your faced with the thought that someone has placed a keylogger on your computer and hacking you there is one way to get around it. You can change your passwords to sites but, if they are getting it non stop, then what good does it do? There are basically two ways you can change your password that the keylogger will not be able to get.

The first way is don't ever type your password just have a certain text somewhere that you can simply copy and paste the password in. Since your not typing it then it should not be able to read it.

The second way takes a little bit of work and some thought. Keylogger will record any letter, character or number typed, however, I have yet to see a keylogger that records the arrow buttons. It records how items are typed. So lets say your password is "geekdrop" or so the keylogger thinks so. What the keylogger doesn't see is that you have used the arrow keys while typing in your password.
OK I will use <-- and --> as the arrow keys.
SO this is what the keylogger sees you type:
geekdrop
it sees that because that was the order it typed it in but it failed to see the arrow keys so really you typed:
gee<--k-->dr<--o-->p
so lets think about this and break it down. You typed in gee then backed your mouse to between the two e's and added the k they hit the arrow button forward past the seconed e to type a dr then the arrow back to put a 0 in between the dr, then forward the mouse past the r to add a p. So really it may have read geekdrop because it was in that order but really it was
gekedorp

Ok your going HUH what is she talking about. Think about it and re-read this a few times and it will hit you. If not ask away

NOTE: If you read below it has been pointed out that some keyloggers do read arrow buttons so this may or may not help you if your having a issue.