Just answering my own question here. I downloaded the Windows 10 media creation tool and made a bootable USB key with it. That got me into a command prompt but I found I didn't even need it as just...

I appreciate the input but I've tried that a bunch of times with no success. It boots so fast that I can't get it to take. I've even tried holding down F8 (and shift-F8) from before touching the...

Man, this helps a lot. I have the same problem with my Dell. One question: how did you get to a command prompt from the login screen?