The Alt+Tab in Windows 11 blurs the background. If you want to remove Alt + Tab blur background in Windows 11, this article shows you how to do that.

Learn how to enable or disable Blurred Background on Login Screen, also called as Acrylic Blur Effect on Sign-in Screen on your Windows 11/10 computer.

For example, the on-screen image, including the wallpaper, will look very blurry if the monitor supports a 1920 by 1080 resolution, but Windows 8 is configured to output at a 1366 by 768 resolution.