My wife used a local password to log into Win 10, and got a Microsoft account, specifying another password. The next time she booted up, neither her old nor new password was accepted. We don't have a Win 10 CD to fix things, because we downloaded Win 10 online. I've tried downloading a couple of password workaround apps to my own PC, creating a USB drive that can be booted from, putting it into her computer, and configuring her BIOS to boot from it, but Windows always starts same as usual; looks as if it's not reading the USB drive regardless of the BIOS setting.
I've also tried booting up in Safe Mode with Command Prompt, but I'm not given a command prompt; just a larger login screen. Has anyone any other ideas to either change her password or just disable her password requirement altogether? She doesn't need that type of security anyway.