Another precaution you can take against keyloggers is an on-screen keyboard that hides anything you enter into a password field.  I usually type all sensitive information with Neo's SafeKeys.  It's a small easy to install program, that gives me another layer of peace of mind.

There's many much more robust password programs out there, but I like the simplicity of just typing them in myself.  Even if you run a malware detector, it's possible that which ever one you use will let some malware through. 

Always assume you have malware installed.