Microsoft blocking Windows 10 1903 upgrade on Surface Book 2 with dGPU
(Windows Phone Central)

The newly placed upgrade block is in place due to a compatibility issue with the NVIDIA discrete graphics chip in Some Surface Books 2 devices. What you need to know Microsoft has placed a new upgrade block on the Windows 10 May 2019 Update. The block prevents the update from being automatically installed on Surface Book 2 devices with an NVIDIA discrete GPU. A compatibility issue prompted the block, but there is a workaround for those who have already installed the update. Microsoft put a new upgrade block in place for the Windows 10 May 2019 Update this week, affecting Surface Book 2 laptops with discrete GPUs (dGPU). ...