How to prevent the compression of the wallpaper in Windows 10?

I am running Windows 10 October Update and in case you know that Windows 10 reduces the quality of my wallpaper every time! Of course this is real!

I have already followed this step:

  1. Open Registry Editor
  2. To go HKCU Control Panel Desktop
  3. Create a DWORD value named JPEGImportQuality.
  4. Set it as decimal and the value of 100

But the quality of my wallpaper is still reduced.
For example, here is a test I did to ensure that the configuration still works.

The following is the original image made in MSPaint (2.188kb):

The following image shows the compressed Windows image (85kb):

Every time I set the wallpaper, it reduces the quality. How can I resolve this in the new Windows 10 update?