I recently installed Cubase PRO 8. everything was fine except for some random CPU spikes. they were specially noticeable while opening other programs or loading a webpage in chrome, for example
i read many posts, tried many things, changing drivers, configurations, disabling ASIO Guard, etc. finally what solved the issue for me is disabling the antivirus. eventually i uninstalled it. it was panda antivirus
i searched a lot for a solution and didn’t see nothing about this, so i hope this is useful for someone!