Starting with Windows 10 version 1903 (coming in April 2019) the Sign-in screen gets updated with an acrylic effect. The new effect brings a translucent texture to the experience to help you focus in the sign-in task by moving the actionable controls up in the visual hierarchy while maintaining their accessibility.
Although it’s a nice visual addition, if this is something you don’t want to see during the sign-in process, you can disable the effect using the Settings app.
In this guide, you’ll learn the steps to disable the transparency effect in the Sign-in screen after upgrading to Windows 10 version 1903.
How to disable transparency effect in the Sign-in screen
If you don’t like the transparency in the Sign-in screen, you can disable the effect using these steps:
Click on Personalization.
Click on Colors.
Turn of the Transparency effect toggle switch.
Once you’ve completed the steps, the Lock screen will no longer show the transparency effect. However, because the effect in the Sign-in screen is part of the system Fluent Design experience, it’ll also disable the transparency across the operating system.
If the Sign-in screen doesn’t include the translucent effect before changing the settings, then you’re not running the version of Windows 10 that support this effect. The Sign-in screen with transparency is available with Windows 10 version 1903 and later.