Microsoft releases a new out-of-band update i.e. KB5005393 for Windows 10 1607 users. Installing this non-security patch will fix the printing issue in connection with a SmartCard authentication along with increasing the OS Build to 14393.4532.

Though this problem affects only a small subset of Windows users, updates and mitigation steps from Microsoft are always worth installing on the computer. Here is a quick overview of this optional update –

 KB5005393

KB5005393 Changelog

The key highlights of this build update are as follows – 

  • Addresses an issue that usually prevents printers, scanners, and multifunction devices from working effectively. 

The problem occurs only on those devices that don’t comply with section 3.2.1 of the RFC 4556 specification, which is required for CVE-2021-33764.

Kindly note that all non-compliant printers or scanners will not work efficiently while using smart card authentication (PIV). To enable this temporary mitigation, employ a registry key.

Here’s how to tweak this registry –

  • Press Win + R to open the Run dialog.
  • Type “regedit” in the text box, and hit OK.
  • When the registry window opens up, navigate to the following – 
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Kdc
  • Create a new DWORD entry and rename this to “Allow3DesFallback”.
  • Double-click over the newly created entry and change its Value data to the following –

1 – Enable temporary mitigation

 0 – Enable the default behavior; this requires your device to be in compliance with section 3.2.1 of RFC 4556 spec.

Note: If not done, the issue will continue to occur even after you regularly update on domain controllers (DC) in your environment.

Known Issues on this update

The company is currently not aware of any known issues with this out-of-band update.

Download and Install KB5005393 

Before you proceed to download this update, make sure to patch your device with the latest servicing stack update i.e. KB5001402. Doing so will ensure that the whole update process completes without going into any bugs or issues. 

The optional update KB5005393 is not available to download via Windows update. The only way by which you can get this out-of-band update is through Microsoft Update Catalog

To download this patch file, visit the above site link, pick your system architecture, and hit the download button next to it. The browser will redirect you to a new tab, hit the top link, and save the setup file. 

When the download completes, open the folder containing this file, and double-click over it. Windows 10 1607 will soon start upgrading itself to OS Build 14393.4532. 

Release NoteUpdate History

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