Please check this document to find the workaround solution for Print and Scan - HP Solution Center not working : Adobe Flash Player Error and Unable to scan
Resolve Windows 10 related issues for your HP computers or printers by HP Windows 10 Support Center
I updated intel hd 4000 integrated graphics driver from then i am not able to change brightness and also there was no any brightness slider in the notification panel in windows 10 64 bit
If there is no brightness slider in the notification panel in your windows 10 64 bit , then try updating the graphics driver for your particular HP Notebook from hp.com
Check what display adapter you have by going to device manager and then accordingly download the correct driver from HP.COM software and driver downloads page.
That should resolve this issue.
For any additional help I am always available on HP Forum on fb and gmail. Thanks.
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