This has been on going for me for the past 4 days, and now I'm back to square one
I figured maybe I nuked my windows build, so I reinstalled windows, actually everything worked great, until I ran the update again, I'm back to square one with the stuttering happening and I've finally figured it's a bad update. . .
I had spent the last 4 days testing ram, GPU, updating bios n all sorts (even ran pop os for a bit), ended up backing up all essential files and biting the bullet with a windows reinstall, what an absolute headache! I've still got half a terrabyte of software to reinstall, thank God I didn't do that already before I nuked this build of windows too, back to reinstalling windows again ig