Did you try the usual at http://www.thewindowsclub.com/control-panel-will-not-open-windows
Both my Del desktop and laptop went through the latest Win-10 up date. The desktop went quickly but the laptop re-booted a number of times as advised during the process. I wanted to access Control Panel to delete the Apple Quick Time app. This was fine on the desktop however the lap top will open Control Panel and then it shuts down and reverts to the home screen? All else seems to be OK. However there was one oddity. After I had booted up the laptop, oh say twice, I was alerted that Windows was configuring Win 10 or something to that effect, So as I said I can no longer access Control Panel. All else seems OK so far! Any ideas? Any input will be greatly appreciated Mike....

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