Windows 10 on bootcamp. USB ports not working.
Hello. I set up windows 10 on my older Mac Pro for my son to play games with a friend. The cylinder shaped model. Can not remember the year sorry. Everything worked fine until I updated drivers. Suddenly the keyboard and mouse stopped working so can not log in with the password. It looks like the usb ports are not working. Tried a different mouse and different usb ports but no go. Can not log into safe mode or Bios mode as the keyboard does not work so can not hold down any of the suggested buttons. I downloaded a startup usb windows but can not use that to startup either as how do I do that with no keyboard or mouse working?
Thank you for any help.