Discovering Microsoft’s Unified Write Filter(UWF) on 10ZiG Windows 10 IoT LTSC 2021


In this document we’ll be discovering all you need to know about Microsoft’s Unified Write Filter, or UWF, running on a 10ZiG Windows 10 IoT LTSC 2021 device, namely 10ZiG’s 6010q. We’ll be looking at overlays, what they are, where they reside and outline the pros and cons of using them, and also look at what happens when they become exhausted and how you can mitigate any potential operational issues. We’ll talk about the different types of filter exclusions and how useful and also how critical they are for certain applications and OS functionality. This document will also run through a Proof of Concept(PoC) and best practices for setting up and managing your UWF configuration in the live environment. It will guide you in setting up the overlay, building in certain exclusions and recommend configurations for your local applications. In this PoC section, we’ll explain and give examples of how you can monitor and maintain the UWF, using the GUI, command line and scripting options. This will focus on using tools such as Windows Event Viewer, command line scripting via Powershell and also some messaging tricks via triggers to Windows Task Scheduler. Finally, we’ll talk about ways in which you can customize your environment, so that most of the UWF conditioning of your devices in the live environment is carefully planned and runs automatically, with minimal interaction from your support services and its users. All the configuration and setup options are carried out using the standard “Administrator” user login on 10ZiG Windows 10 IoT LTSC 2021 thin clients.