After a long struggle, Intel has released a graphics driver that enabled HD audio bitstreaming (Dolby TrueHD, DTS-HD, etc.) via HDMI in Windows. This was always working with the Linux drivers but the users of NUC5CPYH and NUC5PPYH NUCs could not get it working in Windows. This should make some HTPC users happy.
There’s a beta driver that corrects the issue (even if release notes do not mention it directly). If you’re more interested, read the long thread on Intel NUC communities. It seems the Intel Download Center page still has an older version of the driver, but we expect an official driver version soon.