i had seen the same thing with my old pc before (microsoft registry checker) it memory serves right, the purpose of such was to check system files and replace files that were changed back to its original state..
i also found it to be very annoying since as far as i can tell, there was nothing wrong with the system files
what i did to remedy the situation was to reformat my pc and reinstall win98
after reformat and reinstall, i never saw it run again
never did get to check on more info on this thing though. it was an old pc and i was able to save all important data rather easily so i had no problems reformatting the pc