win7下 Windows Process Activation Service 服务导致的 iis无法启动的解决方法

 WIN7下安装了IIS，正常使用中，突然有一天断电关机，重启后iis不能用，网页提示403错误。

进服务看，是World Wide Web Publishing Service（www服务）没有启动，右键启动www服务，提示1086错误，依赖的Windows Process Activation Service 服务没有启动。

再去看 Windows Process Activation Service（WAS服务），处于停止状态，果断右键启动它，提示：错误：6801  指定资源管理器中的事务支持未启动或已关闭。

有说法是微软某个补丁导致的错误，处理后均未解决。最后找到一哥们的资料：

IIS services fail if WAS fails    

You may receive "Windows could not start the Windows Process Activation Service - Error 6801: Transaction support within the specified resource manager is not started or was shut down due to an error" error message and IIS services fail to start. I have tried to uninstall and reinstall the IIS and WAS roles/features with no luck. The following command (assumes that the system drive is c:) helped:

fsutil resource setautoreset true c:\

源地址：http://blogs.msdn.com/b/amb/archive/2011/06/21/iis-service-startup-problem-error-6801-transaction-support-within-the-specified-resource-manager-is-not-started-or-was-shut-down-due-to-an-error.aspx

在开始-》运行命令框里，输入：fsutil resource setautoreset true c:\ 后回车解决了问题。

问题原因好像是WIN7的用户管理UAC权限出现问题。