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New firmware updates are rolling out to Surface Pro 4 and Surface Book - here's what's new

New updates for Microsoft's Surface Pro 4 and Book devices are available today, assuming that you're already running the Windows 10 Creators Update. It's not a massive list of changes, with two updates for the Pro 4 and three for the Book, but there are some fixes listed.

It's only been 19 days since the last batch of firmware updates was released for the devices. In fact, those were exclusive to Creators Update users as well.

Here's the changelog for the Surface Pro 4:

Windows Update History Name

Device Manager Name

Intel(R) Corporation driver update for Intel(R) Smart Sound Technology (Intel(R) SST) Audio Controller

Intel(R) Smart Sound Technology(Intel(R) SST) Audio Controller in System devices

  • 09.21.00.2102 improve video playback on installed apps while offline.
Intel(R) Corporation driver update for Intel(R) Smart Sound Technology (Intel(R) SST) OED

Intel(R) Smart Sound Technology (Intel(R) SST) OED in System devices

  • 09.21.00.2102 improve video playback on installed apps while offline.


Here's what's new for the Surface Book:

Windows Update History Name

Device Manager Name

Realtek Semiconductor Corp. update for Realtek High Definition Audio(SST)

Realtek High Definition Audio(SST) in Sound, video, and gc’s

  • 6.0.1.7895 improves Cortana speech recognition.
Intel(R) Corporation driver update for Intel(R) Smart Sound Technology (Intel(R) SST) Audio Controller

Intel(R) Smart Sound Technology(Intel(R) SST) Audio Controller in System devices

  • 09.21.00.2102 improve video playback on installed apps while offline.
Intel(R) Corporation driver update for Intel(R) Smart Sound Technology (Intel(R) SST) OED

Intel(R) Smart Sound Technology (Intel(R) SST) OED in System devices

  • 09.21.00.2102 improve video playback on installed apps while offline.


According to AdDuplex's usage breakdown from yesterday, 24.1% of Surface Pro 4 users and 29.3% of Surface Book users are running the Windows 10 Creators Update on their machines, so that's who these updates should affect. They should improve reliability, compatibility, and performance with no impact on security, connectivity, or battery life.

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