Teri Sheehan
A Microsoft Windows Update is wreaking havoc on printers around the world this week—KB50000802 (for newer versions of Windows 10; older versions of Windows 10 and the server may have a KB ending in 808 or 822 instead) was intended to provide security updates “when Windows performs basic operations”, but the update crashes some print drivers due to the overflow of a 10,000 GDI object limit.
The bug affects a wide range of printers and print drivers – we can confirm that we saw the problem on a PC with Windows 10 2004, which crashes with APC_INDEX_MISMATCH (photo above) after printing on any of the various Kyocera printer models (some locations, others on a network).
If you are suffering from this bug yourself, you can get some relief by uninstalling KB50000802 until Microsoft releases a corrected update, probably on the Tuesday of the April patch.
On a Windows 10 or Windows Server PC version 2004 / 20H2, click Start -> type “Control Panel” and press Enter -> go to Programs, Programs and Features. From there, click on “View installed updates” in the left panel and uninstall Security Update for Microsoft Windows KB50000802).
For PCs with Windows version 1909, the same fix (and problem) is in KB50000808. If you are on version 1809, look for KB50000822. For more technical details, the Dutch technology website winking.be has an excellent overview.
This flaw can also affect PCs with Windows 8.1 or Windows 7 with KBs 848, 853, 841 or 851 … but if you are still on Windows 8 or Windows 7 at this point, you have worse problems than this one. Please update!