Perfmon error- Performance Counter Input string was not in a correct format C#

Issue:

Here is my code float cpuLoad = 0; try{ MessageBox.Show("Running"); //CPU Load PerformanceCounter cpuCounter = new PerformanceCounter(); cpuCounter.CategoryName = "Processor"; cpuCounter.CounterName = "% Processor Time"; cpuCounter.InstanceName = "_Total"; MessageBox.Show("Performance Counter Created"); cpuLoad = cpuCounter.NextValue(); // Here exception is raised } catch(Exception ex) { MessageBox.Show(ex.Message); } I have a try and catch around it and here is the exception it throws Input string was not in a correct format. Solution: try in cmd> lodctr /r If above command is successful then all of your issues related to perfmon are resolved. In case above command is not successful then try following: Open perfmon-> Go to File-> Options-> Delete store files. Now again try "lodctr /r". This should work now.