BC Label Printing Problem After Windows Update

There is a known issue with some printers printing labels after installing KB5003690 or later updates (including out of band updates, KB5004760 and KB5004945 in) July 2021 update to windows versions 21H1, 20H2, 2004. Windows Security Update KB500494 addresses a remote code execution exploit in the Windows print spooler service. This update can render the label printers inoperable. If a Windows test page fails to print, this can indicate the issue is related to the update.

Fix: Uninstall the update and switch off Windows updates, or follow the steps suggested from Microsoft here: https://docs.microsoft.com/en-us/windows/release-health/status-windows-10-21h1#1647msgdesc