Do you have a win 10 installer? If not, on another PC, download the
Windows 10 media creation tool and use it to make a win 10 installer on USB
USB devices should work if you boot off USB, as it has access to its own drivers.
Try running startup repair -
change boot order so USB is first, hdd second
boot from installer
on screen after languages, choose repair this pc, not install.
choose troubleshoot
choose advanced
choose start up repair - this will scan PC and maybe fix this - will ask for logon info
If that doesn't help, try running system restore and see if there is a recent date you can roll back to
change boot order so USB is first, hdd second
boot from installer
on screen after languages, choose repair this pc, not...