Getting the boot menu in the Command Prompt is a trick question. You CAN access the boot menu (a.k.a Advanced Boot Options) from Command Prompt, but you can also do it with a simple reboot and the 'F8' key. If you'd like to get the boot menu from the terminal, follow the instructions below. For Windows 7, click the 'Start' button and type 'command' in the search box, and then click on 'Restart.' While the system reboots, repeatedly press the 'F8' button until the boot menu displays on your screen. Select 'Safe Mode with Command Prompt' and then press 'Enter.' The Command Prompt screen displays and awaits your commands. For Windows 8 and 8.1, press 'ctrl+x' or click the start menu icon, then select 'Windows Powershell (Admin)' to launch the terminal. Next, type or paste "shutdown.exe /r /o" in Powershell without quotes. The command terminal also accepts the same action. Accept the signout window, and your PC will restart and launch the Advanced Options Menu.