title: How to convert short user name into actual Windows user name
body: <p>The <code>startname</code> field of a <code>Win32_Service</code> WMI query reports "LocalSystem" instead of "NT AUTHORITY\System".  Ordinarily this wouldn't be a problem, but the file ACLs I need to create will only accept the full name - not the short name.</p>
  
  <p>Is there a way to convert LocalSystem into NT AUTHORITY\System?</p>