HP dv7-4177nr XH121UA: the screen brightness

After my upgrade to Windows 10, I have not been able to increase the brightness. What can I do to fix this? I have been upgraded. I have nothing else don't alter.

https://www.YouTube.com/watch?v=VWgMY1dzxM0

British Colombia of this video, my brightness is back! Literally just followed the steps there are moments.
Just restart your computer later.

Tags: Notebooks

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