Disregard Windows warning and continue with installation of the latest driver downloaded from Intel. But for your attention, there is the following warning on driver download page:
"Important Note: There have been reported problems with this graphics driver version, and the previous version, 126.96.36.19978. The problem is noticeable flashing, or blinking screens when running at 4K (3840x2160). Graphics driver version 188.8.131.5264 doesn't seem to have the problem and can be downloaded from here, until a fix is posted."
Hope this helps
I want to verify - have you installed successfully the Management Engine driver: Download Intel® Management Engine Consumer Driver for Intel® NUC Kit NUC7i3BN, NUC7i5BN, NUC7i7BN and chipset driver: Download Intel® Chipset Device Software for Intel® NUC Kit NUC7i3BN, NUC7i5BN, and NUC7i7BN ?
Is you operating system Windows 10 64bit?
I take your "yes" for positive answer to my two questions in post #3.
The one think more I can advice, is the following:
1. Download again Intel driver to ensure that you have uncorrupted file.
2. Shut down your router, to switch off your internet (wired and wireless). You can do this also from windows.
3. Uninstall from Hardware Manager the current installed graphic driver.
4. Install the latest driver downloaded from Intel site.