This NUC sports Win10 Pro and currently has driver 6287 installed. Intel Support Assistant calling out 6519. But attempting install causes "driver being installed is not validated" ... "obtain the appropriate driver from the computer manufacturer".
Driver versions below 6444 are non-DCH drivers. These must be manually uninstalled before installing any DCH driver version. Also, the latest driver is version 6890. I am already using it. You can download from here: https://downloadcenter.intel.com/download/28816/Intel-Graphics-Windows-10-DCH-Drivers?product=149161.
Hope this helps,