Problems with Virtual PDF Printers - Potentially linked to KB5094123

[sunrise]

Is MS patch KB4094123 causing problems with PDF24?

I have a Windows Server 2019 Standard

We are seeing issues where existing PDF24 Printers show as disconnected and are unable to install any new ones. The menu in setting appears and pops up UAC but it never adds or detects the printers.

I did some troubleshooting and changed a few things on the system. One of these was uninstalling KB4094123. After leaving the machine to test the virtual printers broke again after KB4094123 re-installed. I've excluded it and am waiting for a reboot window to uninstall the patch again but wanted to check if others are able to confirm similar issues / raise it with the support team if possible.

PDF24 Creator version 9.2.2

[PDF24 Support]

Hello,

we cannot say whether the Windows update is the cause, we could not check this.

Your version 9.2.2 is from September 2020 and is no longer updated. Version 9 is being discontinued. Please install the current version 11 of PDF24 Creator: https://tools.pdf24.org/en/creator

• Version 11.29.1 fixed a problem where the PDF printer could not be installed on some systems.
• On Windows Server 2019, the setup installs the classic PDF printer.
• Since version 11.31.0, you can deselect the components you do not need in the installer (Ghostscript, qpdf, Tesseract, OpenJDK, WebView2), so you get an installation similar in scope to version 9.

If the printers still fail after the update, please send us the file C:\Program Files\PDF24\pdfPrnInst.log to forum@pdf24.org. The setup writes it when it installs the printer.

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