Taichi MB and Windows 7

     My computer gets to the point of trying to load windows 7 pro x64 and neither the keyboard or mouse work.  Both work in the bios pages with no problems.  My bios version is 3.20.  I'm also concerned that the drivers for the hard drives aren't being  reliable.  I've gotten into start up repair, but couldn't give any input to advance further.  At that point my only option was to turn off the computer and try again.  I have also tried booting from DVD, but with the same problem.  I tried to boot from USB, but couldn't find the option in bios.  Any help would be really appreciated.

    Thanks for the responses.  I have a 370 MB so that's a little relief.  The  build uses a Ryzen 7 and 16 GB of ram.  I made the Win 7 boot usb and THEN went looking for the bios option to boot from there, OOPS.  I'm not sure what all those pages were, but I'll check them out.  I'm sorry, but I'll almost need a walkthrough co update anything in bios.  That was never needed in previous builds, very few and long ago.  So, please bear with me.

I have been running Windows 7 on an X370 Killer SLI board since last May.  However, I prefer a PS/2 keyboard and trackball.  I installed from my install DVD, and had just about no problem.  It did take quite a few hours to get all of the updates to Windows 7 installed.

   After all these problems, the problem seems to be : windows doesn't want to load with my external drives connected.  They are connected to a usb3 hub.  I haven't tried just plugging one into a port, to see if it is the drives or the hub, yet.  I did try the front usb2 and usb3 ports.  I can boot with them disconnected and then plug them in with no problems and they work.  That is a pain and takes several minutes while windows is trying to update the drivers.  If anyone knows any solution to this, I would appreciate it.
                Thanks
                        Gus

   I believe this was 2 different problems.  I already had windows installed on an ssd and as soon as I made sure with minimal connections that the system booted, I connected everything else.  The first time, I had the monitor only connected and it seemed to boot to windows.  Things weren't right, the display settings were screwed up.  I also had to close the case.  I put things back together and connected all the cables, usb, network, etc.  When I turned it on again, I got Window's changed hardware and missing thing needed error.  When I tried to do as it said ( run start up repair), I ran into the second problem ( no keyboard or Mouse).  With the screwed up display and the error message, I thought I should install Windows fresh, leading to the forum post.
    The only NEW hardware is the CPU, Motherboard, Power Supply, and Memory.  Everything else has worked with Windows 7 for years.  Before the upgrade, the system booted with everything connected as I tried when I booted up the first time.  That's why I'm confused by the current problem.
                Gus