Like someone above, I was also watching YouTube. Alongside this, I was editing in Photoshop and had Lightroom Classic in the background. I have 32GB RAM and this is never system intensive at all (usually about 10-20% of my system RAM required).
I suddenly get a screen freeze on my external monitor where I was watching the YouTube video and the web browser screen went dark and was frozen.
Then my laptop screen started flickering to black as well. Then back again, then off again. I started to thinking it was my Nvidia GPU driver as some of the latest ones have been giving black screen issues. But after the constant flickering off and on, I finally got Task Manager to stay on my screen long enough for me to see that something called "Feed" and "Search" was using up ALL of my system RAM. Never seen this in my Task Manager before and never ever had my RAM used up like this ever before!!!
I am on a pretty high end gaming laptop with the following specs:
* AMD Ryzen 7 5800H 3.20 GHz (with integrate Radeon Graphics)
* Nvidia GeForce RTX 3070 GPU with 8GB VRAM
* 32GB DDR4 3200 MHz system RAM
* Windows 10 21H2
I have noticed there's an optional update for me called: 2022-02 Cumulative Update Preview for Windows 10 Version 21H2 for x64-based Systems (KB5010415)
I read above that somebody installed that and it seemed to have fixed the issue for them, so I'll be trying this.