service host local system and compatTelRunner


Both “service host local system” and “compatTelRunner” are used for windows update. They use up lots of resources for only checking the compatibility of windows update, especially from 7 to 10

Disable them by following steps:

  1. service host local system high usage
disable superfatch in services.msc
  1. compatTelRunner
taskschd.msc > Task Scheduler Library > Microsoft > Windows > Application Experience > disable "Microsoft Compatibility Appraice"