I've disabled windows update and will check in a week if it's still leaking
Found a (possible) fix! After about a week, my memory was back up to 70%. I saw on some forums that Razer drivers are known to cause memory leaks. Sorting processes by non paged pool, I found RzKLservice.exe had an enormous non-paged pool of nearly 4GB. Ending this process cleared freed up about half of in-use memory while I'm working on my computer. At this point I'm going to uninstall Razer drivers from my computer.