private function _get_systeminfo()
    {
        if ($this->_systeminfo === null) CommonFunctions::executeProgram('systeminfo', '', $this->_systeminfo, false);
        return $this->_systeminfo;
    }
private function _get_systeminfo()
    {
        if ($this->_systeminfo === null) CommonFunctions::executeProgram('systeminfo', '', $this->_systeminfo, false);
        return $this->_systeminfo;
    }
private function _get_systeminfo ( ) { if ( $ this -> _systeminfo === null ) CommonFunctions :: executeProgram ( 'systeminfo' , '' , $ this -> _systeminfo , false ) ; return $ this -> _systeminfo ; }
reads the data from systeminfo

@return string
reads the data from systeminfo