I've created Win10 bootable flash drive using Microsoft's "Windows 7 USB DVD Download Tool". I'm pretty sure it's working: I can boot from it on my PC (legacy/non-UEFI BIOS). But here, when I'm entering boot menu using F9 key: I see the only option -- internal drive. I've tried both SuperSpeed and regular ports -- same result.
So the question is: how I can boot from something "external"?
That's because the newer Win10 laptops come with Secure Boot enabled and that prevents not only booting from external media but even prevents it from showing up in the Boot Devices menu.
You have to go into BIOS settings and disable Secure Boot. While you are there, also look around for a second setting -- Disable booting from portable devices -- and if you find that, disable that, too.
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