Windows – Change “Unidentified networks” to “private” in powershell

I would like to change the connection type for "Unidentified" networks to Private in Windows using Powershell. Ideally this should work in Win 8 and 10.

An alternative solution would be to make windows identify this network and then I can set the location to private. It is a VirtualBox host only network with a Linux host.

I can use the UI to do this with the following steps:

• Open Group policy editor eg (start -> gpedit.msc)
• Computer Configuration -> Windows Settings -> Security Settings -> Network List Manager Policies
• Where it says "Unidentified Networks", Right click -> Properties
• Change "Location type" to Private

I have googled and tried:

$networkListManager = [Activator]::CreateInstance([Type]::GetTypeFromCLSID([Guid]"{DCB00C01-570F-4A9B-8D69-199FDBA5723B}"))
$connections = $networkListManager.GetNetworkConnections()

$connections |foreach {
    $_.GetNetwork().SetCategory(1)
}

but this does not survive a reboot.