Windows 10: Login screen blurred after last update

I am using Windows 10 x64 10.0.19044.1682. I have noticed since the last update in April 2022 that my login screen background is now blurred. I did have and still do have the following Group Policy set as enabled : Computer Configuration>Administrative Templates>System>Logon>Show Clear Logon Background and I have checked that the registry entry : Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\System\DisableAcrylicBackgroundOnLogon is set as 1. To remove the blur I had to turn off transparency effects in Settings/Personalisation/Colours.So it seems this group policy

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Can not access computer. Blurred Sign in screen.

@clemenzina
How to disable Sign-in screen acrylic (blur) background on Windows 10 May 2019 Update | Windows Central
- that's what you're referring to, I believe- the background to the login screen, rather than the lock screen- but should not affect the ability to log on.

That said, if tahalodhi16 is having trouble logging on, but not otherwise, it's worth trying what you suggest.
The article I've quoted also gives the registry details, so that could be done in Safe Mode if it's easy to access that in this situation.

Clarification is needed else we are simply guessing.

 

Hyper V - Win10 Pro Installed - Blurred login screen.

The blurred background on the sign in screen is normal for all W10 machines, whether physical or VM. It can be disabled....

Enable or Disable Acrylic Blur Effect on Sign-in Screen in Windows 10

But that is not your problem. Not having anywhere to enter your sign in credentials is not normal. I suggest your install of W10 in the VM is corrupt and may need reinstalling.

Enhanced Session can give you access to the partitions on the hard drive of the host machine, and also allows a W10 VM to use sound. More info in this tutorial.

Turn On or Off Hyper-V Enhanced Session Mode in Windows 10

 

I cannot login as the screen goes blur.

I cannot login as the screen goes blur. If I click ease of Access then none of the keys work. How to login? I am using Dell PC with Windows 10 1903 version