Hello there,
Please install all the previous updates and then edit the registry and see if that helps. It is recommended that you install all of the latest updates from Windows Update before you install any microcode updates.
To help verify that protections are enabled, we have published a PowerShell script that you can run on your devices.
Install the PowerShell Module:
PS> Install-Module SpeculationControl
Run the PowerShell module to verify that protections are enabled:
PS> # Save the current execution policy so it can be reset
PS> $SaveExecutionPolicy = Get-ExecutionPolicy
PS> Set-ExecutionPolicy RemoteSigned -Scope Currentuser
PS> Import-Module SpeculationControl
PS> Get-SpeculationControlSettings
PS> # Reset the execution policy to the original state
PS> Set-ExecutionPolicy $SaveExecutionPolicy -Scope Currentuser
Hope this resolves your Query !!
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