I've just about had enough of Microsoft's processes in Windows 10 slowing my PC to a crawl. Prime candidates are:-
Service Host processes, of different kinds
Runtime Broker
I've already disabled Cortana and its system scanning for files which takes a lot of resources.
I guess, for many, that don't use their PC continuously throughout the day it's not so critical, and they probably don't notice it.
I have removed all programs I don't use, and many of Microsoft's automatic installations of games and alike. But, still, it's slow.
You might say it's down to my machine. I have as much as 55% HD free space, and have cleared cache, I have plenty of RAM free when these processes are not hogging the system, between the hard drive and RAM. I installed additional RAM beyond that the machine was specified.
It's not an old PC.
Clearly, a new machine with an SSD will be much faster, but the problem of these Microsoft processes will still exist.
If I was one for conspiracy theories i'd suggest that MS is doing this to help drive hardware sales.
No, I think it's just incompetence.