I'll take a look at that now.
As for SearchUI, I'm not sure. As of right now, it's showing 75K for Memory (private working set).
I believe the fault was with my Killer Networking on this Gigabyte board.
I found a few things, including these guides here:
Memoryleak Fix WINDOWS 10 (And 8/8.1) | 1080P HD 60FPS - YouTube
Memory Leak Please Help [Solved] - windows 10 memory leak - Windows 10
Solved Memory Problem - Page 2 - Windows 10 Forums
https://bluebluewave.wordpress.com/2014/02/27/memory-leak-in-windows-8-1-with-killer-e2200-and-windows-network-data-usage-monitoring/
After disabling that registry key, the problem seems to have gone away. Non-paged pool memory is idling at 165MB right now with no signs of increasing unless beginning to open programs.