Starting with Windows Vista, under User Account Control (UAC) access-token filtering can affect which operations are allowed in WMI namespaces or what data is returned. Under UAC, all accounts in the local Administrators group run with a standard user access token, also known as UAC access-token filtering. An administrator account can run a script with an elevated privilege—"Run as Administrator".
When you are not connecting to the built-in Administrator account, UAC affects connections to a remote computer differently depending on whether the two computers are in a domain or a workgroup. For more information about UAC and remote connections, see User Account Control and WMI.
Kapil Mathur [MSFT]