Enable Command Prompt by simply running a command

If you are unfamiliar with directly editing the Registry, you can use a simple command to quickly enable the command prompt. Just follow these steps:-
1) Click on Start and go to Run. Users of Windows 8.1, Windows 8, Windows 7 and Windows Vista, go to Search.
2) Copy and paste the following command and execute it.

REG add HKCU\Software\Policies\Microsoft\Windows\System /v DisableCMD /t REG_DWORD /d 0 /f

3) This should enable the command prompt. If it is still not enabled, restart your computer.

The methods mentioned in this article work on Windows 8.1, Windows 8, Windows 7, Windows Vista and Windows XP.