Apply OEM updates to UWF-protected devices
To apply OEM updates on a Unified Write Filter (UWF)-protected Windows 10 device, you can modify the UPDATE_SUCCESS block of UWF master servicing script (UwfServicingMasterScript.cmd) to call a custom OEM script that applies any required OEM updates. The OEM script should return control back to the UWF Master Servicing Script when finished.
The UWF Master Servicing Script (UwfServicingMasterScript.cmd) is located in the \Windows\System32 folder.
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 through 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