Windows 10 2004/20H2: Issues with Conexant audio drivers partial fixed

[German]Microsoft had already admitted compatiblitiy issues with some Conexant audio drivers under Windows 10 version 2004/20H2 in May 2020. These may lead to problems (bluescreens) with Synaptics audio devices. In December 2020, two problems were fixed.


This information can be found in the Windows 10  status area and was already announced for Windows 10 version 2004 as of May 27, 2020. As of December 11, 2020, there was an update to the entry in question, which now reads as follows:

Synaptics and Microsoft have found incompatibility issues with certain versions of drivers for Conexant or Synaptics audio devices and Windows 10, version 2004 (the Windows 10 May 2020 Update). Windows 10 devices with affected Conexant or Synaptics audio drivers might receive a stop error with a blue screen during or after updating to Windows 10, version 2004. The affected driver will be named Conexant HDAudio Driver under Sound, video and game controllers in Device Manager and have versions,, or through for chdrt64.sys or chdrt32.sys.

I guess what's new is that the exact driver names and driver versions are highlighted in bold in the entry. Also the fixed/open device IDs are known.

For organizations that used Update Compliance, the four previous protection IDs are 25702617, 25702660, 25702662 and 25702673. I had seen a note from colleagues the other day that the upgrade stoppers for device IDs 25702662 and 25702673 had been lifted.

Microsoft and Synaptics are still working on a solution for protection IDs 25702617 and 25702660 and plan to provide an update in one of the next [Windows] releases. For this reason, Microsoft is maintaining the set compatibility lockout for Windows 10 devices with affected Conexant or Synaptics audio drivers. Affected machines will not be offered the upgrade to Windows 10 2004/20H2 until the driver is updated. The compatibility issues and upgrade lockout affect the following client and server platforms:

  • Client: Windows 10 version 20H2, Windows 10 version 2004.
  • Server: Windows Server version 20H2, Windows Server version

Microsoft advises against manually upgrading to the new Windows 10 versions via the Update Now button in Windows Update or the Media Creation Tool (MCT) until corrected drivers are available. The only thing left to do is to wait until this problem is fixed.

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1 Response to Windows 10 2004/20H2: Issues with Conexant audio drivers partial fixed

  1. EP says:


    as of 5/7/2021, Microsoft says the 2004/20H2 issues with Conexant audio drivers is "resolved"

    "Resolution: The safeguard hold with safeguard IDs 25702617, 25702660, 25702662, and 25702673 has been removed for all devices as of May 7, 2021, including devices with affected drivers. If updated drivers are not available for your device and you are offered Windows 10, version 2004 or Windows 10, version 20H2, a small number of devices might roll back to the previous version of Windows 10 when attempting to update. If this occurs, you should attempt to update to Windows 10, version 2004 or Windows 10, version 20H2 again."

    a few sites have noticed this change:

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