How can I take a screenshot of the Windows 10 Login Screen?
I have read How can I take a screenshot of my logon screen in Windows 7?. Unfortunately, the posted answers reportedly only work for either Windows XP or 7.
I've considered using VirtualBox or VMWare as suggested in How can I take screenshots of the PC before it boots up?, but this wont allow me to capture a computer-specific login issue*. The aforementioned question also specifically asked for solutions before the PC boots into Windows.
*The "Shut Down" button disappeared from my desktop's login screen, but that's an issue for a future question.
Best Answer
Add the Snipping Tool as the Ease of Access button to do the job.
Open Registry Editor and navigate to the following location:
Create a new Key called utilman.exe on the left panel and a new String value called Debugger at the right panel. Then set the path of the snipping tool (see below) as the value of the string.
At the Login Screen, Click the Ease of Access button, the one next to the Power button at the bottom right corner of the screen. The snipping tool pops up. Take the screenshot of the Login Screen and click Copy button to copy it to the clipboard. You won’t be able to save the screenshot you just took, but you can still use Clipboard as your middle man to transfer the content.
Log back to your desktop, launch Paint app or any other photo editing or screenshot app you use and paste it.
Source: https://www.nextofwindows.com/windows-10-tip-how-to-take-screenshot-of-lock-screen-and-login-screen