CompatTelRunner
In the meantime, I am still focusing on CompatTelRunner and what is now called Desktop Analytics, which is shipped in both Windows 10 and Windows 7/8/8.1 updates. I believe that Desktop Analytics (formerly Upgrade Readiness and Upgrade Analytics) works by associating the collected data with a "commercial ID" that is entered into the registry. The most likely reason why CompatTelRunner is causing high CPU and HDD/SSD usage (which even MS employees not working in the Windows division complain about) is Appraiser doing for example application and device inventory, which has "enterprise" and "indicator generation" modes that to this day MS refuses to document.