Experienced the same issue today. Booted my system up and went to open a browser before it began to stutter. It was using spiking RAM usage to 97%. I was able to kill the task and disable the news feed from the taskbar.
AMD Ryzen 9 3900X
32GB RAM
Nvidia 3080Ti (ver 51.79 drivers)
OS 19043.1586Version 21H1
I just had this problem happen to me right now. I'm running a very similar build but my GPU is Asus ROG STRIX 3090. My OS is a newer version too 19044.1526. I was just browsing on Chrome when everything started to lag out so I checked task manager and noticed that search was using all my ram.