Microsoft has shipped Windows 10 October 2018 Update with tons of new features. improvements and a broken Task Manager. As spotted by a Reddit user, the Task Manager tool is not reporting accurate CPU usage after upgrading to Windows 10 October 2018 Update. […]

from https://www.bleepingcomputer.com/news/microsoft/task-manager-shows-incorrect-cpu-usage-in-windows-10-october-2018-update/