The Windows 10 lock screen is not absolutely necessary and can be disabled, but only by editing a specific key in the Windows Registry file.
One of the first aesthetic features a user sees when logging on to a computer running the Microsoft Windows 10 operating system is the lock screen. Typically, the lock screen displays a pleasant image, or perhaps the company logo, and then patiently waits for user input. To get past the lock screen and move on to the Windows 10 login screen, a user has to click, or swipe, or press Enter.
The lock screen feature is not the worst user experience, but it is entirely unnecessary. Unfortunately, while there are several configuration settings available in Settings that users could use to modify what the Windows 10 lock screen displays and how it is configured, there is only one way to remove the lock screen completely and that is by editing the Windows Registry.
This how-to tutorial shows you how to disable the lock screen in Microsoft Windows 10 by editing the Windows Registry file.
SEE: Windows 10 May 2019 Update: An insider's guide (free PDF) (TechRepublic)
Disable the Windows 10 lock screen
Disclaimer: Editing the Windows Registry file is a serious undertaking. A corrupted Windows Registry file could render your computer inoperable, requiring a reinstallation of the Windows 10 operating system and potential loss of data. Back up the Windows 10 Registry file and create a valid restore point before you proceed.
To get started, open the registry editor by typing "regedit" into the search box located on the Windows 10 desktop and then click the appropriate item in the search results. Navigate to the following key, as shown in Figure A:
Search under the Windows folder for a key named "Personalization." As is the case in our example, it is possible that the Personalization key will not exist, which means we will have to create it.
Right-click the Windows key and select New | Key and give it the name Personalization, as shown in Figure B.
Now, right-click the new Personalization key you just created and select New | DWORD (32-bit) Value. Enter NoLockScreen as the name, as shown in Figure C.
Double-click the NoLockScreen entry you just created and change the value to 1, as shown in Figure D.
Click the menu item File and then select Exit to close the registry editor.
To test the success of your editing, manually lock your Windows 10 PC by pressing the Windows logo key + L (a popular keyboard shortcut). Instead of the lock screen you would typically see, you should now see only the login screen, patiently waiting for you to enter your credentials.
If you ever want the Windows 10 lock screen back, just edit the Windows Registry file again and change the value of the NoLockScreen key back to 0.
Windows 10 May 2019 Update: Everything you need to know (TechRepublic)
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