Why do I think it's NVIDIA's problem? The freeze appears only when the dGPU(NVIDIA) is turned from off to on.
At first I thought the dGPU switch is made by the intel chipset but it's made by NVIDIA Optimus, see here: http://www.nvidia.com/object/optimus_technology.html they even have a great video: THE BEST NOTEBOOK EXPERIENCE ... wooow!!!
How did Intel solve the problem with the left click, or control panel? Simple they avoided triggering the dGPU, because the intel driver triggered the dGPU like other desktop applications (Chrome, Firefox, etc.)
Microsoft can make a fix for this - same like Intel to avoid triggering the dGPU for desktop applications, but that is beyond stupid. Why should they do that if for example on a 6700HQ + GTX960M the switch is perfect with no freezes, I know this because, as I said, I own both laptops and tested them. There are a lot of desktop applications that need the dGPU, like Adobe Photoshop or Adobe After Effects, not all people who bought this combination use it only for gamming. And the freeze is very annoying when using those applications.
We should also write on NVIDIA's forum, because I think it's their fault. The Drivers belong to NVIDIA, it's their job to make sure that it works with Windows 10.
I am starting to think that this is a hardware problem from NVIDIA and cannot be fix through software, if that is the situation we should get our money back or NVIDIA should recall all laptops and fix them.