https://downloadcenter.intel.com/do...el-Graphics-Driver-for-Windows-?product=80939
https://communities.intel.com/thread/111280
Intel 21.20.16.4590 driver, first official release for desktop and mobile Kaby Lake released in Jan 2017, also supports Skylake.
Sadly, although the download link says "Win7, Win8.1, and Win10 64-bit", it's not for Windows 7. At least, not unless you have a Skylake CPU. Kaby Lake support in these drivers is ONLY for Win10.
Of course, I'm certain it's just a software lockout, there's probably no reason that the drivers wouldn't work for Win7 64-bit, if you could get the installer to work right.
Edit: It seems like something is wonky in these drivers. I installed them over the Win10 auto-installed HD630 drivers, and on one DeskMini box in Win10 64-bit, when I go to the Intel Control Panel, it shows: "OpenCL: 0.0" for driver version. On the other one, it shows the proper 2.1.
Why wouldn't the OpenCL drivers get installed?