What I mean by restarting your machine is shutting it down, then turning it back on again.
As far as your graphics card, go to the manufacturers website and look for your card. They should offer you the latest driver. Download it and run it. That should overwrite what you have and update you.
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There's a known issue with a laptop that has both Intel HD graphics and discreet GPU.
In your case, you may need to disable Intel HD graphics from Nvidia control panel (Optimus settings)
Hope this helps,
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