Unknown memory leak on Win 11 pro

Hello,

For the past couple months I have been experiencing a weird issue on my windows machine. Usually around 8  or so hours after a clean reboot, task manager will start reporting 170+GB of 190GB of RAM is in use. However, when I tally the entire list of processes I can only account for 4GB in use. When I use RAMMap its the same story, I can account for 4GB and it appears windows has simply misplaced a 150GB of memory. The only other symptom I notice is when I shutdown, the shutdown process will take 40+ minutes sometimes as if some microslop process is refusing to die. This does not occur when I shutdown while memory usage appears normal.

So far I have tried:
Using different web browsers and uninstalling the one I had been using. 
Removing pretty much every piece of software I have been using while the issue occurred.
Ensured windows, firmware and drivers were properly updated.