In this post, we will learn how to open the Command Prompt window at the Login screen or Boot on your Windows PC. Command Prompt (cmd.exe) is the default command line interpreter for Windows. It is ...

Do you mean DOS or an NT command prompt? AFAIK, most BIOS updates are done in either DOS or GUI Windows. A command prompt only NT is a bit tricky, and not very useful anyway. A DOS booting USB stick ...