日志Error:Failed to execute request because the App-Domain could not be creat...

1.Error:Failed to execute request because the App-Domain could not be created. Error: 0×80070005 Access is denied.
具体情况如下:
Server Application Unavailable
The web application you are attempting to access on this web server is currently unavailable. Please hit the “Refresh” button in your web browser to retry your request.
Administrator Note: An error message detailing the cause of this specific request failure can be found in the application event log of the web server. Please review this log entry to discover what caused this error to occur.
查看Event Viewer,看到的错误为:
Error:Failed to execute request because the App-Domain could not be created. Error: 0×80070005 Access is denied.
Warning:Failed to initialize the AppDomain:/LM/W3SVC/1052609887/Root/skyy_mobile

解决方法：在web的目录权限里加入：Network Service 用户