had the same issue with 7900xt, when switched from nvidia to amd, the only thing that completely resolved my issue was a clean install of windows, there is a key thing in my case, driver didnt work only with reBar/SAM enabled. idk if its even possible to enable rebar in bios with integrated gpu.
anyway you can try to disable driver signature enforecement, maybe it will solve the issue in your case, didnt help in my case as permanent solution, after every restart issue remained.
