A sintaxe correta do comando usado no PowerShell para habilitar Hyper-V no Windows 10 é
Get-VM Online -FeatureName Microsoft-Hyper-V
Get-Command -Module hyper-v | Out-GridView Online -FeatureName Microsoft-Hyper-V
Set-VM -Name -CheckpointType Standard Hyper-V
Enable-WindowsFeature -Online Microsoft-Hyper-V
Enable-WindowsOptionalFeature -Online - FeatureName Microsoft-Hyper-V -All