Click on view & choose show process tree. It should show you whats running under it. Under mine is searchUI,, shellexperiencehost (your desktop), runtime broker & Skypehost but they are all suspended (grey), as well as settingsynchost
I decided if i was going to tell people to use this program, I might as well myself
If its search taking it all, try rebuilding the index: https://www.tekrevue.com/tip/how-to-solve-windows-search-issues-index-rebuild/
Have a look here:
http://news.softpedia.com/news/windows-10-high-cpu-usage-fix-490908.shtml
top 4 here might help, think they show examples from win 7 but it should still work: http://www.wintips.org/how-to-fix-svchost-exe-netsvcs-memory-leak-or-high-cpu-usage-problems/
is this a fresh install of win 10 or an upgrade? Fresh install could fix this.