Hey guys! First post for me. :) Been taking up the problem of system and service host: local service eating all the ram. So I've been clicking some stuffs at the settings when suddenly I solved my problem unexpectedly! So here's how you do it. :)

1. Open Windows.
2. Click settings.
3. Click Update & Security (You'll be headed at Windows Update screen).
4. Click Advanced options.
5. Click Choose how updates are delivered.
6. Turn it OFF.
7. Voila! Problem solved.

I hope I solved your problems too. :) I hope this post will help many people by sharing this link to them. :)
Godbless! Waiting for your replies! :)