背景：

     全新服务器，需要增加性能监控，发现无法通过powershell读取性能指标

解决方法：

• Open the Registry Editor by going to the Start Menu and selecting Run…, then type “regedit”, and click the OK button.
• Navigate to the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurePipeServers\winreg registry key.
• Right click on the "winreg" key and select Permissions. Add users or groups to which you want to grant Read access.
• Exit Registry Editor and restart Windows.

[20141121]无法通过powershell读取sql server性能计数器问题