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#11
From what you say an update seems like the culprit. I don't install automatic updates. To me it's not wise to put multiple fixes on a machine at the same time unless it's a service pack. Even then I have an image of my system partition to fall back on.
Somehow you need to find a way to go back. It may take clean install. For future reference I'd get an external drive or 2 and an imaging backup program like Macrium Reflect or Easus ToDo. You can find several free imaging backup programs on
www.thefreecountry.com