Why shutdown-s access denied

Users questions: I use Vistahb I want to shutdown-s to time in the event of a shutdown, but denied access to what is the reason for ah, how? You can now ask why in the cmd when at11: 11shutdown-s useful in xp, in Vi sta useless when you say
Experts answer: may be programmed under XP, so not on the Vista system. This site has details: http: ** hi.baidu.com * ninganfu998 * blog * item * a9627 f353207578fa71e123a.htmlVISTA system can indeed use the shutdown command to shut down. I WindowsVistaHomePremium version, use the shutdown can successfully shut down. shutd own * s command shutdown. shutdown * s * t600600 seconds off. Due to VISTA set up to only 600 seconds. If you want to achieve a more prolonged time off, using the above methods do.
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