Once in the command prompt, the primary objective is often to repair the Master Boot Record (MBR) or the Boot Configuration Data (BCD).
: Insert a Windows Server 2012 R2 DVD or bootable USB. Select your language, then click Repair your computer in the bottom-left corner of the setup screen. windows server 2012 r2 boot repair
To verify drive letters:
At the Command Prompt, type:
Before attempting repairs, you must understand what happens during a successful boot. Windows Server 2012 R2 uses the following sequence: Once in the command prompt, the primary objective