Update for the Surface Book - Surface UEFI Content provided by Microsoft Applies to: Surface Book Select Product Version All Products Summary This update improves system stability. How to get this update This update will be downloaded and installed automatically. It will be listed in the Windows Update history as follows: Microsoft driver update for UEFIPrerequisitesThere are no prerequisites for installing this update.Restart informationYou may be prompted to restart the computer after you apply this update.Update replacement informationThis update doesn't replace a previously released update. File Information Surface UEFI (v90.1380.768.0) References Learn about the terminology that Microsoft uses to describe software updates. Last Updated: 18 Nov 2016 Did this solve your problem? Yes No Tell us what we can do to improve the article Submit Thanks! Your feedback will help us improve the support experience.