Even if you are 100% about your computer that is clean, the keylogger
protection is very important whenever you use another computer such as
when you go to an internet cafe or to a friend.
Don't panic, you have a few sollutions:
If you are familiar with Linux, you should make a copy of
Knoppix(Knoppix is a bootable Live system on CD, see this for details). In this case, no
matter how many keyloggers there are on the computer, you have your own
read only operating system so you are safe
You can use a virtual keyboard such as http://www.lakefolks.org/cnt/.
It is a Click-N-Type keyboard designed for anyone
with a disability, but it can be used against keyloggers, simply by
clicking keys with the mouse whenever you have to write sensitive
information such as passwords
Use Anti Spyware program to clean
the system you are using from nasty keyloggers