Disable CompatTelRunner.exe
Disable CompatTelRunner.exe when it consumes a lot of I/O and CPU.
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
Go to:
Computer Management – System Tools – Task Schedule Library – Microsoft – Windows – Application Experience
or run taskschd.msc
and disable the following:
Name: Microsoft Compatibility Appraiser
Location: \Microsoft\Windows\Application Experience
Collects program telemetry information if opted-in to the Microsoft Customer Experience Improvement Program.