If you want to open the Command Prompt window on your Login screen or the Boot screen in Windows, here are different ways to do it.

You can open the Command Prompt on a PC by right-clicking the Start icon, by searching for it, or by opening the Windows System folder.

The good old command prompt is still handy, and it's more robust and customizable in Windows 10.

Open Windows Command Prompt with Admin rights. In order to enable the Search Box on the Windows 10 lock screen, execute the following command: "<FULL PATH OF THE MACH2.EXE FILE>" enable 17917466 ...

An unpatched exploit in Windows 7, Windows Server 2008 R2 and Windows 8 Consumer Preview allows a user to launch an elevated command prompt by manipulating the sticky keys function.