Installing Microsoft Windows* 7 from USB Drives onto USB 3.0 Computers
Windows 7 installation media does not include native driver support for USB 3.0, so during installation, when you get to the screen to select your preferred language, a keyboard or mouse connected to a USB 3.0 port does not respond. Any Intel® NUC that has only USB 3.0 ports is affected.
This Readme document describes three methods to resolve the problem:
Windows 7* USB 3.0 Creator Utility