Hello,
I'm sure most of you with windows 10 have had some version of the runtimebroker.exe bug... er... "feature", where it either grabs all your cpu cycles, grabs and won't release all your memory, or seems to be doing something over the network all time (or all 3 of these). I did, and here's what I think was doing it.
Apparently windows 10 will search your network for, and automatically add, any shared media libraries or folders. These are the usual "videos", "photos", and "music" folders. On my network, I have a windows home server box that is also a media server, and windows 10 automatically added these shared folders to the "libraries" on all 4 of my win10 computers. Unfortunately if not indexed properly, the default action of windows 10 will be to absolutely beat the shxt out of the hard drive hosting those networked folders that are in the win10 library. As a simple example of what is going on behind the scenes, the win10 default app "photos" will automatically crawl all libraries looking for duplicates, and attempt to build albums and collections. Well, with my computer this process never ends so on 2 of my 4 win10 computers runtimebroker.exe would take 25-50% cpu time, over 80% of physical ram, and saturate the network attempting to download info from the shared library folders.
I think that removing the networked folders from each computer's list of libraries has at least partially fixed the problem. I'll have to see if it is permanent or if win10 will re-add the networked folders to the library folder list again, restarting the destructive thrash of my WHS hard drives.
Thought this might help.. there are a couple other things that can make runtimebroker.exe go rogue, but this one was the one that got me and it was destroying my server's drives.