i did a virus removal that left a rundll disabled. it may have been a fake rundll from the virus, but the computer worked ok. at start up it kept showing that rundll not operating. after 1 week i did a system restore and now my screen is blank after the orignial window xp opening screen. so the log in screen is not coming up I can still get in on safe mode and everything seems ok there. however, now i have no restore points. I did a system restore a second time when the first one didn't seem to correct the situation....after that my restore points all blanked out.