Thank you for reaching the Intel Communities. I understand you are not being able to install Windows 7* on your Intel® NUC Kit NUC7i5BNH and possibly you want to use that OS for a specific reason.
In this case, I regret to inform you that Windows 7* is not officially supported on the unit, for that reason I cannot guarantee it can work, but some recommendations can be given for sure.
This is the OS support article for you to check: Supported Operating Systems for Intel® NUC Products
Then, some recommendations:
- Test different Windows 7* ISOs with the tool used to insert USB 3.0 drivers
- If possible, use a Windows 8.1 system to insert the USB 3.0 drivers, some peers have reported it works better with Windows 8.1
- You can also test other tools outside Intel* to insert USB 3.0 drivers to the ISO
Additional article to be checked: Install Windows 7* on Computers with USB 3.0
I am sorry to hear you are facing troubles with the Windows 10* ISO as well! DavidAkers
Are you getting any sort of error message when it fails?
Did you use the Medial tool creator from Microsoft to create the USB bootable device?
Maybe this can help as well:
Please let me know how it goes.