You can watch tutorial below...
STEP 1
We can launch other programs on the Winlogon desktop with the PsExec command, available on Microsoft’s website. The PsExec command is part of the Sysinternals suite of utilities.
After downloading the PSTools package, place the PsExec.exe command into your path – for example, in the C:\Windows\System32 directory.
STEP 2
Next, launch a Command Prompt as administrator by right-clicking the Command Prompt shortcut and selecting Run as administrator.
From the administrator Command Prompt, run the following command to launch a command prompt window on the Winlogon desktop:
psexec -sx cmd.exe
FINAL TRICK
Lock the screen with WinKey+L and press Alt-Tab to reveal the Command Prompt running on the Winlogon desktop. You’ll also see the command prompt if you press Ctrl-Alt-Delete and Alt-Tab on the Ctrl-Alt-Delete screen, which also runs on the Winlogon desktop.
Use the Command Prompt to launch screenshot utilities and other applications on the secure desktop.
via Howtogeek
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