Overview

Microsoft released a Windows Security Update (KB5004945) to patch an exploit in the Windows Print Spooler service that can allow attackers to remotely execute code with administrator privileges.  As a result, this caused some printers to stop working.  Microsoft has since released a Known Issue Rollout (KIR) to correct this issue.  The KIR should have been applied automatically when a computer reboots.

NOTE: If the rollout has already been applied, the following registry entry should exist:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FeatureManagement\Overrides\4\1861952651

Affected Zebra label printers:

• LP2824
• ZD410

Procedure

1. Empty the Print Queue
2. Disconnect the USB cable from the printer
3. Uninstall the printer and all drivers (including the Zebra drivers from the Print Server Settings)
4. Install the latest version of Zebra Setup Utilities
5. Connect the USB cable to the printer
6. After the drivers are installed, reconfigure the printer
7. If this does not solve the issue:
   1. Run Windows Update and allow it to install any new updates.  This is to ensure the KIR will be applied as well as install a small update to the .NET Framework.  Note: In some cases, this new update may not be available right away.  Try waiting an hour before running the Windows update again.
   2. Reboot the computer

References

• https://support.microsoft.com/en-us/topic/july-6-2021-kb5004945-os-builds-19041-1083-19042-1083-and-19043-1083-out-of-band-44b34928-0a71-4473-aa22-ecf3b83eed0e
• https://www.zebra.com/us/en/support-downloads/printers/desktop/lp-2824.html
• https://www.zebra.com/us/en/support-downloads/printers/desktop/zd410.html