About This File
PDH Performance Counters
Measure Process, CPU, Network, Process, Disk (etc) Usage
...read all about it at /topic/90736-performance-counters-in-windows-measure-process-cpu-network-disk-usage/
you can reach the old site via the WaybackMachine, and get any other material you may need from there.
Edited by argumentum
might as well use https://web.archive.org