Typing Consumes my CPU - rundll32.exe

[Guest]

Something has changed on my XP SP2 desktop. Having only IE6 open and typing
an email in Yahoo consumes 98% of cpu. iexplorer.exe and rundll.32.exe take
it all. My keystrokes are delayed, and I have to stop typing for it to catch
up.

?

 

[Guest]

Oh, also, when I stop typing, CPU use goes back way down to 8-10%.

 

[Bob I]

Maybe you have a keylogger trojan installed. What is the malware status
of the PC?