System.ComponentModel.Win32Exception : Access is denied

Question

I'm having windows service. I'm using PerformanceCounter class to get CPU Data from Domain Machine. I'm running my code with Domain Admin privilege.

So problem is here, I'm able to get CPU Data using PerformanceCounter while running code in Visual Studio. However, Same code is not working after installing windows service.

Here's code:

PerformanceCounter pc = new PerformanceCounter();
pc.MachineName = "ws-Rahul";
pc.CategoryName = "Processor";
pc.CounterName = "% Processor Time";
pc.InstanceName = "_Total";

double value = pc.NextValue();

Below is exception:

System.ComponentModel.Win32Exception : {"Access is denied"}

Answer 1

Services typically run as Network Service or Local System, unless you have configured them overwise. It sounds like you haven't changed the service logon user. You can do it from service control manager by right clicking the service and going to the Logon tab. Or you can do it from the command line:

sc config ServiceName obj= Domain\user password= pass

Note the space between obj= and Domain\user it is not a typo. It is required. The same for password=.