That type of detail could pose a threat, particularly if the image is of a potential target for stalkers or burglars. As only ...

Click OK, and check the Login Screen. This policy setting disables the acrylic blur effect on logon background image. If you enable this policy, the logon background image shows without blur.

As said earlier, there are to ways to get rid of Alt Tab blur in Windows 11 – using Windows Settings and using Registry Editor. Open the Registry Editor and navigate to this path: HKEY_CURRENT ...