Windows 10 blue screen crash when printing - KB5001567 fix How to fix the APC_INDEX_MISMATCH Blue Screen of Death printer driver issue on Windows 10 (Kyocera, Tiger, Olivetti and other brands) with the KB5001567 update for Windows 10 2004 and 202H

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If you've stumbled upon this post it most likely means that you (or your users, in case you're a System Administrator) are experiencing the dreadful Blue Screen of Death issue when trying to print with your favourite printer - be it Kyocera, Ricoh, HP, Epson, Tiger, Brother, Utax, Triumph Adler, Gestetner, Olivetti and a lot of other brands.

More specifically, the BSOD gives the following error message:

APC_INDEX_MISMATCH for win32kfull.sys

The problem

The issue is caused by the following Microsoft security update patches that have been released on March 09, 2021 for various versions of Windows 10:

The workaround

For the first week, the only viable workaround was to selectively uninstall the above patches using the following  console command:

It's worth noting that you'll only have one of the above patches installed on your system, depending on your actual Windows 10 version: if you're not sure of what you have you can either check your version from Control Panel > System > Info  or execute all the above commands until you find the correct one (the others will do nothing, thus causing no harm).

The above workaround will positively fix the issue, however it's far from ideal since these patches are included in the official Windows 10 update channel, meaning that the system will try to re-install them upon each Windows Update: this will force you to manually uninstall them after every update (or subsequent printer-based BSOD)... Unless you choose to disable Windows Update, which will likely be the worst thing you can do in terms of security. Luckily enough, now there's a permanent solution to avoid such choice.

The fix

Since March 15, 2021 Microsoft has released a permanent fix for this issue in a cumulative update for Windows 10 20H2 called KB5001567: in order to install it, you just have to upgrade your system to Windows 10 20H2 and be sure to install the latest updates available from the official Windows Update channel. However, if you don't want to do that (or can't due to corporate policies) you can also choose to install the update manually.

In order to do that, navigate to the following link:

Once there, identify the KB5001567 executable which is compatible with your Windows 10 version and CPU Architecture, download and execute it. The update process will likely require some time (~5 minutes on an average PC) but will permanently fix that nasty printer issue, letting you print all you want without risking any more BSOD.


That's it, at least for now: we hope that this post will help other Windows users and System Administrator to permanently get rid of the nasty BSOD printer issue they're experiencing with their favourite printers.


About Ryan

IT Project Manager, Web Interface Architect and Lead Developer for many high-traffic web sites & services hosted in Italy and Europe. Since 2010 it's also a lead designer for many App and games for Android, iOS and Windows Phone mobile devices for a number of italian companies. Microsoft MVP for Development Technologies since 2018.

View all posts by Ryan

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