Build 21277 is out as an Optional Update

@johnny_55

Regardless of the "I'm done", you had asked for a scenario to be explored and I just went through it so, you are stuck reading the results.

Drew, 

On your IB could you try Enabling the policy and then check the registry after a reboot.

After that set it back to "Not configured" and see if anything changes.

I went through it on both the IB & 20H2:

They are identical, except for 1 difference.

Yes, both, when Enabled have System in Reg & Disable, etc... value there

Yes, both, when Not configured, System, etc is gone from there

BUT❗...

20H2 is blurred if Not configured, as should be and sharp or focused if Enabled, as should be.

While the IB is sharp or focused whether Enabled OR Not configured❗ It doesn't matter which, it stays unblurred.

Johnny, YOU may find this interesting.

Cheers,

Drew

I'm laughing...

It's a 20H2 PC with Dev IB a vm in Hyper-V and no, would have no bearing.

Transparency effects is On; always has been or is. (Imagine you can see why I'm chuckling😂)

Cheers,

Drew******

VM in Hyper-V is a different game too, I just use real machines, I'm done on this subject.  😆

Happy Holidays!

I'm laughing...

It's a 20H2 PC with Dev IB a vm in Hyper-V and no, would have no bearing.

Transparency effects is On; always has been or is. (Imagine you can see why I'm chuckling😂)

Cheers,

Drew******

Not that this should have any bearing, are these two separate computers or dual boot.

Johnny, 

The other possibility is policy not configured and the transparency turned off, which also eliminates the blurred logon screen.😊

Drew, 

On your IB could you try Enabling the policy and then check the registry after a reboot.

After that set it back to "Not configured" and see if anything changes.

I compared 20277, 21277 and 19042.685 and they all behave the same way on this "Acrylic" stuff. 

When the policy is set to "Not Configured"  the System key disappears completely.

Enabled:

Not Configured: