For months, Microsoft has been blocking the Windows 10 May 2019 Update, or version 1903, on its own Surface Book 2 PCs. The reason was due to a known issue where the dedicated GPU driver would disappear from the Device Manager, leaving users to Intel's integrated graphics.
After the PC was blocked from installing the update since July, and it's been broken since May, it's finally getting fixed. Microsoft is pushing out a series of firmware updates that will fix that issue, among a couple of others.
Here's the full changelog:
|Windows Update History Name||Device Manager Name|
|Surface – System – 18.104.22.168||
Surface Base 2 Firmware Update – Firmware
|Surface – Firmware – 182.1004.139.0||
Surface System Aggregator – Firmware
|Surface – Firmware – 389.2837.768.0||
Surface UEFI – Firmware
The updates rolling out are for anyone that's running the Windows 10 April 2018 Update (version 1803) or later. After you install them, you should likely be offered Windows 10 version 1903.
It's possible that the feature update is still blocked for now, since it's still listed as a known issue that's being investigated on Microsoft's Dashboard for version 1903. This probably just hasn't been updated today, and should reflect the fix later on today or early next week.
You can manually download the Surface Book 2 drivers and firmware package here.