Patch Tuesday: KB3013769 Updated with Installation Guidance for 3rd Party Antivirus Errors

A December 2014 rollup for Windows 8.1 and Windows Server 2012 R2 is getting a bit of attention this month as part of Microsoft's regular Patch Tuesday. Some customers reported not being able to install the rollup, while others kept receiving error messages of SYSTEM_THREAD_EXCEPTION_NOT_HANDLED (kl1.sys). Ironically, the update was provided to ensure stability and reliability for Microsoft's most current operating system.

The issue is with 3^rd party antivirus products. Some have fingered Kaspersky as the primary culprit for the problem, but Microsoft does not name names in the updated KB article. Instead, the company has provided a workaround.

The workaround isn't a great one. It involves performing a system restore, uninstalling 3^rd party antivirus, ensuring that Microsoft's own Defender product is running, and then reinstalling KB3013769.

The full description is here: December 2014 update rollup for Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2