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Fix errors related to user mode isolation when starting a shielded VM.
Fix user mode isolation errors using Shielded VMs on 2016
John Savill
July 31, 2016
1 Min Read
Q. I receive an error trying to start a Shielded VM that User Mode host isolation is off. How can I fix this?
A. Shielded VMs requires User Mode isolation to help elements of the security. To enable User Mode host isolation the machine must be configured with Secure Boot and the required policy should be set as follows:
Open local or group policy object that applies to the machine
Navigate to Computer Configuration - Administrative Templates - System - Device Guard
Double click Turn on Virtualization Based Security
Set the policy to Enabled
Set the Select Platform Security Level to Secure Boot and the two other options as Disabled (Virtualization Based Protection of Code Integrity and Credential Guard Configuration)
Click OK
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