I've been having all kinds of problems since upgrading to Win 11. Really wish I would have stayed on 10, not sure what compelled me to upgrade. I did have the occasional crash/client freeze issues, but now I get random PC resets, browsers just exit, and clients disappear, it's been a real shitshow since upgrading.
I think at least some of it is hardware-related. Trying to run 128gb of ram has been a real challenge, do not recommend, at least not with the board I'm running. In the time I've posted this, 2 of my clients have crashed to desktop.
At one point, I was playing with some OC settings and when pushed as hard (and stable) as possible, windower wouldn't even boot up, just insta-crashed. Looks like I'm the minority with Windows 11 causing issues in XI though so /shrug.
Edit: My hardware:
https://pcpartpicker.com/list/2gNRmr