I've successfully installed Win7, everything works well, except USB. It means that I need only USB 3.1 driver for B360 chipset.
I understand you, there is no questions anymore.
You did not successfully install windows 7, else you would not be here. Did you find ANY drivers for Windows 7 listed on your motherboard manufacturer's site? The answer is no, you did not.
Again, only windows 10 is supported on 7th gen and later processors. This is a Microsoft issue: https://support.microsoft.com/en-us/help/4012982/the-processor-is-not-supported-together-with-the-wi...
You carefully avoided providing your motherboard model number and processor model number, knowing this was the case.
Purchase a Windows 10 key, or use your Windows 7 key for a Windows 10 install, and avoid all the future problems. I suspect you will continue to try and use Windows 7 past January 2020. Why waste the time and effort? If you want to run WIndows 7, install Windows 10, turn on Huper-V, and then install WIndows 7 as a VM on WIndows 10.
I do not want to avoid carefully providing my motherboard model. Please, understand me, may users use that they want to use?
I have all-in-one PC with Intel i5 8250 processor, I do not know motherboard model. I have all-in-one PCs with i5 6200, i5 7200 - they work with W7 without any plroblem. I did not know, that there is such problem with i5 8250, when I was buying new PC.
Win7 works fine but only by TeamViewer, because keyboard and mouse do not work.
I need to use W7 because I have special hardware and software and it doesn't work in W10. That's all.
"I need to use W7 because I have special hardware and software and it doesn't work in W10. "
And, will this special hardware and software be corrected by 2020?
Upgrade the special hardware and software, or use your i5-6200.