For some reason the Windows drivers for the Sony Inzone M9 monitor are not showing under downloads on the Sony product support page. Without the drivers Windows simply shows the monitor as “generic display” and lists it as “HDR not certified”.
To locate the drivers download page go to the Sony product support page and search for “Inzone M9”. Filter the hundreds of results by type – select “downloads. You should now see a page titled “Driver Downloads”. I have also linked the page below.