Control Panel

Windows 7 Control Panel Displays Blank

It seems there are times that computers get tired and decide to take a nap or maybe decide to stage a strike. How else would you explain a situation where a computer has been working without a hassle and suddenly you open the Control Panel and all you get is a blank screen staring at you? Of late I have noted my laptop has been running slowly and I thought this was due to the number of applications installed.