System restore doesn't do nothing...
completely re-format your computer.. like put your windows disc in...and re download it, your computer will be back to the way it was the day you got it..I GUARANTEE that the keylogger will be gone
K. If you're lurking and still have this problem, i'd suggest a complete reformat of your computer, as the virus, which most likely is a RAT, is FUD, so no AV will pick it up.
I would recommend you scan (if you have) ipods/smart phones anything that can a virus can be put on..
Im thinking he put a virus on sometthing like that and when you plug them back in the virus is back, although im not entirelly sure if this is possible.. but then again.. what can't technology do nowadays