– Go in to advanced system properties, User profiles and delete all known and unknown accounts except for Administrator and Default Profile.
– RunĀ Get-AppxPackage -AllUser | Remove-AppxPackage (Don’t mind the wall of blood)
– Run Get-AppxPackage -AllUser | Remove-AppxProvisionedPackage -OnlineĀ (Don’t mind the wall of blood)
Run sysprep again.