^ geofelt, Seems this problem is more common than you might think for legit versions - depending on his exact problem.
But if a pirated version this problem is a given as you stated.
Legenprice, My wife's system had this problem, or very simular. It had failed service pac 1 update way back (she never mentioned that). This also prevented some Updates. For the life of me I could not fix.
Finally re-installed windows as a Upgrade over the top of Win 7. This corrected the problem - Had to re-download all windows updates. But not as bad as it souonds as all drivers and programs where still there. It Only "upgraded/overwrote the" core windows files.