WMI credential is fine and CPU is monitored without problem. But other than that, Memory and HDD is not monitored. 

When I manually check the Performance monitor it works but not automatically every 15 minutes which is intended to. It reads  the Memory and HDD only when I manually check. It used to work w/o problem but now most of... maybe all of the windows Memory and HDD WMI monitoring stopped. 

Also, When I delete the performance monitors of Memory and HDD and added again, it works fine. But I cannot do it all of the devices.

Best Regards

Sangchul Jung