My plotter driver stopped working after applying KB5039211 (Win. 10) resp. KB5039212 (Win. 11)

Question

Hello everybody,

Many years ago (~Win. 2K) I developed for my company a monolithic, user-mode, plotter driver that supports HP/GL 1. It worked perfectly (recompiled and digitally signed, of course) until two days ago when some of our customers applied the patches mentioned above, KB5039211 and resp. KB5039212. There is no error message (EventViewer shows nothing) but the HP/GL commands are simply not there.

Could someone (who is familiar with device drivers development) explain to me what happened ?

We have thousands of applications installed around the world that rely heavily on that piece of software.

Regards,

Answer 1

Hi Manson Dong,

Thank you for posting in the Q&A Forums.

KB5039211 and KB5039212 are cumulative updates released by Microsoft for Windows systems, potentially for Windows 10 or a specific version of Windows Server. These patches may include improvements to system security, stability, and performance, but may also introduce compatibility issues with existing software or hardware.

Since your driver was developed for an older version of Windows, Windows 2000, and it has only recently encountered compatibility issues with these new patches, it suggests that the driver may not have been updated or tested for these new versions of Windows or these patches.

You can try to fix the problem by uninstalling the updated patch in the settings. Or upgrade the software to adapt to the updated system.

Best regards

NeuviJ

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