Shell Experience Host, .exe, think thats it, wipes out start menu too.
mobsync is one i kill. a f-ton of services, usually later, no lan cable connected.Shared Experiences -> Connected Devices Platform. It's a bunch of protocols for syncing user state btw multiple devices (PC, Windows Phone).
Basically nobody uses it. If it broke something, means some background services are annoyed, or it can't talk to the cloud.
Shell Experience Host is a GUI wrapper to UWP apps. Just uninstall all your UWP apps, and you'll be fine