Alt + Tab is one of the most frequently used key combinations in Windows systems. However, although this function is provided in Windows 11, it will cause the screen to be very blurry. Fortunately, Microsoft fixed the window blur issue in the Build 22000.65 preview update released today.
As you can see in the screenshots here, everything looks exactly as you expect. If your thumbnail is also blurry, then you can now install Windows 11 Build 22000.65 to fix it. It is now available in the Dev channel as part of the Windows Insider program.
