I'm now on Win 11 Pro Build 22631 and had this same error. Task Manager showed no clues or indications of where my 64GB was used at 100%.
I'm running Hyper-V with a Linux VM running. In the Hyper-V Manager is the only place I found that the VM was using 56GB of the 64GB I have.
I internally updated everything in my Linux VM and rebooted that, and my insane memory usage has stopped.
I don't know if it's a memory leak in the dynamic memory setting of Hyper-V or perhaps my VM internally has a memory bug.
But rebooting my VMs resolved my insane memory usage.
