For Gigabyte was less forth coming all I saw listed under compatible O/S was this:
Support for Windows 7 32-bit/64-bit
* Please download the “Windows USB Installation Tool” from GIGABYTE’s website and install it before installing Windows 7.
I then scrolled back up to this section.
Then I selected: CPU/Memory Support and Downloads.
I put in these search parameters:
Download Type: Utility Choose your OS: Windows 7 64bit
The 2nd Item in the list is:
Windows USB Installation Tool
(Note) Support Intel 100 series motherboards.
Choose your download source and good luck!
Windows 7 Is Obsolete
After further research I found this article on http://wccftech.com:
“To begin with, Microsoft is removing support for the EHCI host controller (USB 2.0 spec) and keeping only the xHCI host controller spec (also known as the universal USB 3.0 specification). While the USB 3.0 spec is backward compatible with most USB 2.0 and 1.0 functions, installing windows 7 via USB will not be one of them (source: EXPReview). I have to admit one thing though, Intel has absolute plausible deniability on this. No one can claim with 100% certainty that they are in league with Microsoft in trying to push Windows 7 users to finally get a move on. The reason for that is that the discarding of EHCI was inevitable sooner or later, and while they could have taken steps to remedy the problem easily, they have no compulsion to do so. The problem begins with the fact that Windows 7 does not have the code to support master xHCI based installation via USB, with only installation over EHCI allowed.
You might be thinking that one can always take the bootable DVD route and even though research indicates that dependence on optical drives is diminishing by the second, it has its own caveats. You better hope that your motherboard has a PS/2 port because even while installing from a DVD, the USB ports wont work (during the install setup). If you have just one PS/2 port you will have to switch your PS/2 based mouse and keyboard as required through the entire process. All this means that Windows 7 will be very very troublesome for people to install and in most of the cases, people will consider it not worth the effort. Even if you do get it to work, the lack of EHCI means there might be unforeseen compatibility issues in the future. Effectively, from Skylake, and thanks to Intel’s spec upgrade, Windows 7 is now officially an obsolete OS.”
Here is the complete article: http://wccftech.com/intel-skylake-remove-support-usb-based-windows-7-installation-platform-specs/
Windows 7 may be considered obsolete by Microsoft & Intel
2 points to this article, 1st the PS/2 port isn’t a hot swap connection so I’d just use the PS/2 keyboard and tab between sections, 2nd though Windows 7 may be considered obsolete by Microsoft & Intel, I still sell more Windows 7 in a week than Windows 8 thru Windows 10 combined in a Quarter, it isn’t even close.