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function OnSystemAccount(): boolean; 
var 
sName:     string; 
dwNameLen: DWORD; 
begin 
  dwNameLen := 253; 
  SetLength(sName, 254); 
  GetUserName(PChar(sName), dwNameLen); 
  SetLength(sName, dwNameLen); 
  if UpperCase(Trim(sName))='SYSTEM' then Result:=True else Result:=FALSE; 
end;