Windows update platform

After the firmware update package is on the end-user's system, Windows will use the UEFI UpdateCapsule function to hand-off the firmware payload to the platform firmware for processing.

Deploying the update as a driver package allows the firmware update process to align with many existing deployment and servicing tools, and ensures simple update package authoring for hardware vendors. The fact that the firmware update is delivered as a driver package does not mean that the update is written as an actual driver. The driver package will contain an INF file and a binary file containing the system or device firmware image. For the purposes of updating device firmware, the device firmware can be assigned to one of these two categories:.

This device firmware can be updated using a device driver package leveraging the same mechanism as system firmware.

A device firmware update is distributed as a firmware update package. After the firmware update package is on the end-user's system, Windows will use the UEFI UpdateCapsule function to hand-off the device firmware payload to the platform firmware for processing. This process is virtually identical to how Windows hands off system firmware update payload, and is discussed below.

It is recommended that device firmware be updated using a discrete firmware update driver package, but device firmware may also be updated with system firmware as part of a single firmware update driver package.

UEFI should not be used to update peripheral devices. UEFI requires devices to be present during reboot to apply a firmware update which cannot be guaranteed with external, removable peripheral devices. This device firmware can be updated by the device driver during the normal Windows OS runtime.

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