Apply OEM Updates to UWF-Protected Devices (Standard 8)

12/1/2014

Learn how to apply OEM updates to your Unified Write Filter (UWF)-protected Windows Embedded 8 Standard (Standard 8) device.

To apply OEM updates on a Unified Write Filter (UWF)-protected device, you can modify the UPDATE_SUCCESS block of the UWF Master Servicing Script (UwfServicingMasterScript.cmd). Before you can modify the script, you must first take ownership of it (see Take Ownership of a File or Folder). Once you have ownership, modify the script to call a custom OEM script that applies any required OEM updates. The OEM script should return control to the UWF Master Servicing Script when finished.

The UWF Master Servicing Script (UwfServicingMasterScript.cmd) is located in the \Windows\System32 folder.

UPDATE_SUCCESS (UwfServicingMasterScript.cmd)

The UPDATE_SUCCESS block of the UWF Master Servicing Script follows:

:UPDATE_SUCCESS
echo UpdateAgent returned success.
REM
REM echo UpdateAgent executing OEM script
REM OEM can call their custom scripts
REM at this point thru a "call".
REM
REM The OEM script should hand control
REM back to this script once it’s done.
REM
REM Any error recovery for OEM script
REM should be handled outside of this script
REM post a reboot.
REM
uwfmgr servicing disable
echo Restarting system
goto UPDATE_EXIT

See Also

Concepts

Service UWF-Protected Devices
UWF Master Servicing Script
Unified Write Filter (UWF) Overview