Hello Ben, I understand your concern about this issue with your new machine. It seems like creating new user accounts with administrator permissions might have caused some system conflicts. Let's troubleshoot this issue step by step: 1. Boot into Safe Mode: Since Safe Mode is not working due to the message that Windows hasn't finished installing, it's possible that your recent user account changes have affected the system start-up. We can try some other solutions to access the system. 2. System Restore: If you have access to a Windows installation disk or USB drive, you can try to boot from it and perform a System Restore to a point before you created the new user accounts. This can help revert the system to a stable state...