请问Dell 有没有散热问题,也就是机身比较热? 还有屏幕和机身间铰链是否也像Lenovo一样非常牢,不会有swing事情发生? 顺便问一下,Does Vista Ultimate run not as good as Vista business edition? 我想 upgrade to vista business, 不知是不是upgrade to ultimate 更好? 谢谢您。