Another way: #include <Security.au3> Global $g_aComputerSID = _Security__LookupAccountName(@ComputerName) If @error Then Exit ConsoleWrite(_GetAccountName($g_aComputerSID[0] & "-500") & @CRLF) ;~ Administator Account SID ConsoleWrite(_GetAccountName($g_aComputerSID[0] & "-501") & @CRLF) ;~ Guest Account SID Func _GetAccountName($_sAccountSID) Local $aAccountSID = _Security__LookupAccountSid($_sAccountSID, @ComputerName)&#