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
原文：http://www.cnblogs.com/Amaranthus/p/4112643.html
