I have had this situation long before 21277.
- Long ago I made my Win10 be NOT blurred.
- My IBs have been blurred & focused, at various times/inconsistent. Prefer NOT blurred. It was set to Not configured, even though NOT blurred.
- Quite some time ago, noticed the IB was NOT blurred, anymore. I had done nothing to change it.
- Since this discussion realise the IB (NOW) stays NOT blurred regardless of how Group Policy is set.
- I hadn't given this much concern before this discussion.
Cheers,