From https://superuser.com/questions/944067/windows-disk-i-o-100-at-boot-for-20-minutes
The exe is here:
C:\Windows\System32\CompatTelRunner.exe
Computer Management – System Tools – Task Schedule Library – Microsoft – Windows – Application Experience
or
Start – Run – taskschd.msc
Name: Microsoft Compatibility Appraiser
Location: \Microsoft\Windows\Application Experience
Collects program telemetry information if opted-in to the Microsoft Customer Experience Improvement Program.
→ Disable