一架服务器突然无法取得服务器的状态（roles 和 features）
检查event,发现的以下错误
server manager encountered an unexpected error while collecting data about the stutus of this computer
HRESULT:0×80070543
Problem:
The server-wide COM security settings have been changed to have a “Default Authentication Level” of ‘None.’
解决方案：
1. Using elevated permissions, run Dcomcnfg.exe
2. In the “Component Services” window, navigate to ComponentServices->Computers->My Computer.
3. Right-click on “My Computer” and select [Properties] from the context menu.
4. In the “My Computer Properties” dialog, select the [Default Properties] tab.
5. Change the “Default Authentication Level” drop to ‘Connect’; if it is set to None.
7. Change the “Default Impersonation Level” to Identify; if it is set to something else.
8. Press the OK button in the “My Computer Properties” dialog.