Re: graphics downgraded

With the limited information given I'd say it's most likely a graphics driver issue.

Try using DDU to completely uninstall your graphics driver:

http://www.guru3d.com/files-details/display-driver-uninstaller-download.html

and then reinstall the latest driver directly from AMD or Nvidia's website.

Unfortunately 

The problem was not resolved

But I think this problems is from my Windows registry

My windows is 10 

How can I find a windows 10 backup registry?

Can anyone take a backup from windows 10 and send it ?

The only way to safely restore your registry is either use a registry restore tool software, or do a clean install of windows.