Windows 10 Upgrades – Dealing with Safeguard ID 25178825 (Conexant ISST Driver)

I saw a tweet recently from Madhu Sanke where he had deployed updated Conexant ISST drivers to his environment to release devices from the Safeguard ID 25178825 which at the time of writing still prevents devices trying to upgrade to 2004 or 20H2.

You can read more about the issue here, but around September/October 2020 timeframe, newer drivers became available that are not affected by this Safeguard and updating the drivers will release a device from this hold.

Madhu took the approach of downloading the drivers from the Microsoft Update Catalog and packaging them with a script wrapper for the install. In researching this myself, I found that there are more than one driver available and different models will take different drivers, so I decided to write a little C# program that will update a device using Windows Update directly instead.

The program simply connects to Windows Update online, checks if a newer driver version is available for the Conexant ISST audio driver (listed under ‘Conexant – MEDIA – ‘ in the MS update catalog), and downloads and installs it.

The executable can then be deployed as is using a product like Microsoft Endpoint Configuration Manager.

For environments where software updates are deployed with Configuration Manager / WSUS, the program will check if registry keys have been set preventing access to Windows Update online and temporarily open them. It will restore the previous settings after updating.

The program also logs to the Temp directory.

On my HP laptops, the driver in question is this guy:

This one has been updated and is no longer affected by the Safeguard.

You can download the C# executable from my GitHub repo, or you can clone the solution in Visual Studio and compile your own executable. Just remember to run the program in SYSTEM context or with administrative privilege on the client as it’s installing a driver.

A reboot is usually required after installation and the driver can display a small one-time toast notification like this:

If your devices are managed by Windows Update for Business, you may see a notification from there as well, depending on your configuration of course.

After deploying the driver update to affected devices, expect to see them being released from the Safeguard after telemetry has run. You can use my PowerBI reports to help with reporting on Safeguards in your environment.

Thanks again to Madhu for the inspiration!

Windows 10 Feature Update Readiness PowerBI Report (MEMCM version)

Following on from my previous post where I shared a PowerBI report that provides information on Windows 10 feature update blocks using Update Compliance and Desktop Analytics, in this post I will share another report that exposes similar data, but this time built from custom hardware inventory data in MEMCM.

Outside of the Windows setup process, feature update compatibility is assessed on a Windows 10 device by the ‘Microsoft Compatibility Appraiser’ – a scheduled task that runs daily and the results of which form part of the telemetry data that gets uploaded to Microsoft from the device. The specifics of this process are still somewhat shrouded in mystery, but thanks to the dedication of people like Adam Gross we can lift the lid a little bit on understanding compatibility assessment results. I highly recommend reading his blog if your interested in a more in-depth understanding.

Some compatibility data is stored in the registry under HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags, and in particular the subkey TargetVersionUpgradeExperienceIndicators contains useful compatibility information for different W10 releases such as the GatedBlockIds, otherwise known as the Safeguard Hold Ids, some of which are published by Microsoft on their Windows 10 Known Issues pages. Since the release of Windows 10 2004, many devices have been prevented from receiving a W10 feature update by these Safeguard holds, so reporting on them can be useful to identify which devices are affected by which blocks, and which devices are not affected and are candidates for upgrade.

By inventorying these registry keys with MEMCM I built the PowerBI report shown above where you can view data such as:

  • Which Safeguard holds are affecting which devices
  • Rank of model count
  • Rank of OS version count
  • The upgrade experience indicators (UE)
  • UE red block reasons

Note that this data alone doesn’t replace a solution like Desktop Analytics which can help identify devices with potential app or driver compatibility issues, but it’s certainly helpful with the Safeguard holds.

You can also use this data to build collections in MEMCM containing devices that are affected by a Safeguard hold. Because this is based on inventory data, when a Safeguard hold is released by Microsoft those devices will move naturally out those collections.

Understanding the data

Because of the lack of any public documentation around the compatibility appraiser process, we have to take (hopefully!) intelligent guesses as to what the data means.

Under the TargetVersionUpgradeExperienceIndicators registry key for example, you may find subkeys for 19H1, 20H1, 21H1 or even older Windows 10 versions. I haven’t found any keys for *H2 releases though, and I can only assume it’s because the Safeguard holds for a H1 release are the same for the H2 release. From the Windows 10 Known Issues documentation this seems to be the case.

There is also a UNV subkey – I assume that means Universal and contains data that applies across any feature update.

Under the *H1 keys (I suppose I should call it a branch, really) we can try to understand some of the main keys such as:

  • FailedPrereqs – I haven’t seen any devices yet that actually failed the appraiser’s prerequisites, but I assume the details would be logged here if they were.
  • AppraiserVersion, SdbVer, Version, DateVer* – I assume these indicate the version of the compatibility appraiser database used for the assessment
  • DataExp*, DataRel* – these seem to indicate the release and expiry dates for the Appraiser database so my assumption is a new one will be downloaded at or before expiry
  • GatedBlock* – the Id key in particular gives the Safeguard Hold Id/s that are blocking the device from upgrade
  • Perf – this appears to be a general assessment of the performance of the device. A low performing device will likely take longer to upgrade
  • UpgEx* – these seem to be a traffic-light rating for the ‘upgrade experience’. The UpgExU seems to stand for Upgrade Experience Usage – I don’t know what the difference between the two is. Green is good, right, so a green device is going to be a good upgrade experience, yellow or orange not so great, red is a blocker. I don’t know exactly what defines each colour other than that…
  • RedReason – if you’ve got a red device, it’s blocked from upgrade by something – but this isn’t related to Safeguard holds as far as I can tell. It seems to be related to the keys under HKLM:\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\CompatMarkers\*H1, such as BlockedByBios, BlockedByCpu for example. The only one I’ve seen in practice is the SystemDriveTooFull block.

Configure Custom Hardware Inventory

Alright, so first we need to configure hardware inventory in MEMCM to include the registry keys we want to use. You can use the RegKey2Mof utility, or you can download the files below to update your Configuration.mof file and your Client Settings / hardware inventory classes. I’ll assume you are familiar with that process.




If you choose to use different names for the created classes, you’ll need to update the PowerBI report as it uses those names.

Download the PowerBI Report

Download the PBI template from here:

Windows 10 Feature Updates Readiness

Open opening, you’ll need to add the SQL server and database name for your MEMCM database:

You won’t see any data until devices have started sending hardware inventory that includes the custom classes.

Note that I have included pages for both 20H1 and 21H1, but the latter is just a placeholder for now as no actual compatibility data will be available until that version is released, or close to.

MEMCM collections

You can also build collections like those shown above by adding a query rule and using the names created by the custom classes – in this case TwentyHOne and TwentyOneHOne. Use the value option to find which GatedBlockIds are present in your environment.

Hope it helps!

PowerBI Reports for Windows 10 Feature Update Compliance

This morning I saw an interesting tweet from Sandy Zeng with a Log Analytics workbook she’d created for W10 feature updates based on Update Compliance data. I’d been meaning to create a similar report for that myself in PowerBI for some time, so I took inspiration from her tweet and got to work on something!

Microsoft’s Update Compliance solution can be used to report on software updates and feature updates status across your estate from Windows telemetry data. If you use Desktop Analytics, you can even combine the data for richer reporting.

Log Analytics allows exporting of queries in Power Query M formula language, which can be imported into PowerBI to create some nice reports.

Here’s a screenshot of what I ended up with. You can filter the data to view devices with Safeguard holds, for example, which since Windows 10 2004 has been a show stopper for many wanting to upgrade…

There are pages for 2004 and 20H2, as well as a page listing some of the known Safeguard hold IDs that have been publicly disclosed by Microsoft.

You can download this report for your own use with the links below. Note I have created two reports – the first assumes you have both Update Compliance and Desktop Analytics using the same Log Analytics workspace. If this is not the case for you, download the second report which doesn’t link to DA data and just uses Update Compliance. The only data I’ve included from DA is the make and model since these can be helpful in analysing devices affected by Safeguard holds.

Windows 10 Feature Update Compliance

Windows 10 Feature Update Compliance (no DA)

To create your own report, you’ll need the latest version of PowerBI desktop installed, with preview support for dynamic M query parameters.

Open PowerBI and go to File > Options and settings > Options > Preview features and enable Dynamic M Query Parameters.

Restart PowerBI and open the downloaded PBI template. Upon opening, you’ll be prompted for the Log Analytics workspace ID. You can find this on the Overview pane of your workspace in the Azure portal.

The reports contain data with a timespan of the last 48 hours, but you can change this if you want by editing the queries in the Advanced editor, and changing the value “P2D”.

You also might want to play around with the LastScan filter so you only get devices with a recent scan date, and avoid duplicates.

Hope it’s helpful!