Starting with the Windows 10 anniversary update, you can show the lock screen wallpaper in the login or sign-in screen as well. However, with the wallpaper option enabled for the sign-in screen, there appears a problem where the lock screen shows up with a black background instead of a Windows Spotlight image or a wallpaper.
This issue occurs if both the following conditions are true:
- The visual effects setting “Animate windows when minimizing and maximizing” is disabled…and
- The personalize setting “Show lock screen background picture on the sign-in screen” is enabled.
With the above settings, when you lock the workstation, the lock screen shows up with a black background. But when you dismiss the lock screen, the sign-in screen appears correctly with the background image.
To show wallpaper in the lock screen background, change any one of the above two settings. This, of course, is only a workaround that you can use until Microsoft fixes this bug — perhaps in the upcoming Creators Update.
Option 1: Enable “Animate windows..” setting
1. Press Winkey + R to bring up the Run dialog.
2. Type sysdm.cpl and press ENTER
3. Select the Advanced tab and click “Settings” under Performance.
4. Enable “Animate windows when minimizing and maximizing”
5. Click OK, OK.
Option 2: Disable background picture on the sign-in screen
1. Right-click on the desktop, and click Personalize
2. In the Settings window that opens, select “Lock Screen”
3. Turn off “Show lock screen background picture on the sign-in screen”
That’s it. You’ll no longer see a black lock screen from now.
About the author
Ramesh Srinivasan founded Winhelponline.com back in 2005. He is passionate about Microsoft technologies and has a vast experience in the ITeS industry — delivering support for Microsoft's consumer products. He has been a Microsoft MVP [2003 to 2012] who contributes to various Windows support forums.