Windows 10: Tell Windows I'm busy, stop using so much CPU in background

I need lots of CPU time while bouncing MIDI to audio, and when Windows is very busy in the background I get lag in the rendered audio.

Is there a way to tell Windows stop doing all those ad-hoc things (System) so I can work? At sort of CPU aimed Focus Assist.

When Windows System stays busy like that I have to reboot to stop it. System idle at 30% is inconvenient.

And Resource Manager doesn't give detail about the various System processes CPU usage.

:)

 

3d display stopping in background

When I have another window in the forground, the background ATI TOOL .24b stops rendering. I sometimes want to stress the card while I am doing other things. I am running 2 monitors and enableing it to render in the "background" would be fantastic!

Currently it only renders if I move another window around, as soon as I stop moving it, it stops rendering.

 

Pentium M

Not sure what I'm looking at. Though when I do go to Options and then CPU it lists my CPU
as Intel Pentium M processor 1.73 GHz, and then under that it lists speed: 799.9 MHz
and then features and cache size.I ran the benchmark test and don't understand all
those numbers, but while testing I checked CPUZ and it still says it is running at 800 MHz.

 

Windows store background task 100% cpu

Thanks for the generl advice, but there isnt a store service this is a background task (backgroundtaskhost.exe), the fact a background task is allowed to use 100% cpu is clearly a bug, but anyway this is most likley scheduled task but there are no obvious
candidates in the list of tasks.