My friend upgraded her HP Probook 4525s from Windows 7 to Windows 10 via the streamed upgrade she was offered. She can't remember exactly what she did, but we have now a Windows 10 login screen for which the account is called "Recovery" and for which we need a password which we don't know. Her own account password doesn't work. I've tried enabling the built-in administrator a/c as you could with Windows 8 using a Windows 8 CD, but this doesn't bring up the command line at the login screen as it would with Windows 8. Has anyone anyone seen this behaviour before and have any idea how to fix?