Windows 11 IoT Enterprise LTSC 2024 Deployment Guide

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Windows Updates with UWF Servicing Mode

Microsoft provides various updates, which are categorized as important, recommended, and optional. These updates offer significant advantages, including enhanced security and improved device reliability.

During normal operations, with the Unified Write Filter (UWF) enabled, windows updates are automatically disabled as they would be discarded upon device reboot due to the UWF overlay clearing. The UWF Servicing Mode allows you to schedule a job for planned automatic critical Windows Updates and antimalware signature files.

When UWF Servicing Mode is triggered,

  • The operating system reboots the device, clearing the UWF overlay and temporarily disabling the Write Filter (WF).
  • A designated maintenance window opens, providing a dedicated time for update installation.
  • The device scans for and applies any necessary Windows Updates within the maintenance window.
  • The device enters a locked state. Do not enter any keys or enter any password when the UWF-Servicing screen is displayed.
NOTE:Devices require an Internet connection to update using UWF Servicing Mode.

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