What is the reason and/or fix for UE5 (5.03 & 5.1) freezing my whole pc?

Also,

Very temporary solution for those who has a freeze on Rendering.
Since it is SDD buffer that gets overloaded while saving all the image sequences too quickly, you need to slow down rendering just a bit (so it has time to save frames without overloading buffer).

For myself I just added extra Anti-Aliasing ->Spatial Sample Count.
This slowed down frame rendering a bit (now it’s few frames per second, instead of 30fps or more) and SSD is able to write them down without freezing.