Ive tried all the ideas posted herein. The only progress I’ve made is to use an external 3rd party webcam, presumably because it does the video encoding in the camera so reduces demands on the Surface Pro’s feeble graphics processor. I now routinely watch for the GPU overload problem, just in case but the external webcam doesnt use the 3D library, is much better behaved. So far.
For completeness’ sake, yes, I have the latest version of Zoom, the latest Microsoft patches for Surface Pro, I’ve tried turning off various combinations of hardware acceleration, reinstalling, not using virtual backgrounds, etc, etc.
if this wasn’t a company-issued PC, I wouuld have returned it to the stire as not fit for purpose. Microsoft have a very long-established culture of selling half-baked software and hardware and this is yet another exhibit. Why we tolerate in this day and age defeats me. Buy Apple, it’s cheaper in the long run! :)