Installing these updates to Surface UEFI firmware requires that the device be already updated with a newer Surface System Aggregator firmware (v234.2110.1.0 or greater). Instructions to ensure this are stated below.
If you install these updates using Windows Update, Windows Update will automatically install components in the necessary order. You may need to check for updates, install updates, and restart several times to fully install all these updates.
If you install these updates using the MSI, the MSI will automatically detect if prerequisites have been met and install updates in the correct order. The MSI will first install an updated Surface System Aggregator Firmware and restart to apply that firmware. After restart, a scheduled task will run the MSI again to install an updated Surface UEFI Firmware and restart to apply that firmware. After restart, a scheduled task will run the MSI again to install all the remaining components and restart one more time.
If you use WSUS to install updates and you have turned on automatic approval for all driver updates, you must offline update all Surface Pro (Model 1796) and Surface Pro with LTE Advanced (Model 1807) devices using the July 2018 MSI files unless they already have the required Surface System Aggregator firmware (v234.2110.1.0 or greater). If they do not already have the required Surface System Aggregator firmware (v234.2110.1.0 or greater), do not update these devices using WSUS with automatic approval turned on for driver updates for your Surface devices, as the firmware may not be installed in the required order.
For deployments of new devices, you need to ensure firmware is applied in the correct order. If your new devices already have Surface System Aggregator v234.2110.1.0 or greater installed, you can extract the July 2018 MSI and use that for new deployments. You can check the version installed on a new device by booting into Surface UEFI (Volume Up button + Power button when the device is off) and checking the version for “SAM Controller”.
If your devices have Surface System Aggregator that is lower than v234.2110.1.0, you need to ensure that Surface System Aggregator firmware v234.2237.257.0 (the version in the July 2018 MSI) is installed first. Here are two methods to accomplish that:
1) Turn on the new devices, quickly go through all the steps to get into Windows (you do not need to install updates or connect to a network), then run the July 2018 MSI file and let it automatically update firmware in the correct order. Then you can reimage that device with your normal deployment process.
2) Extract the July 2018 MSI, install only Surface System Aggregator Firmware v234.2237.257.0, and restart before installing any other Surface firmware component updates (Surface UEFI Firmware, Surface Management Engine Firmware, Surface Integrated Sensor Hub Firmware).
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