I was told that " screen shaking is *usually* a phantom touch problem. An easy way to test for this is to bring up an app like paint and full-screen it, then see if the device is registering touch inputs periodically.
If it is a phantom touch problem, you can try the steps here: https://support.microsoft.com/en-US/help/3165497 "
Keep us posted.
If the "screen shaking" is really caused by a phantom touch problem, then logically, disabling the 3 touch devices as indicated below should eliminate "screen shake".