KB4519338 updates Windows 10 1809 to Build 17763.806 – 8 Oct 2019

Microsoft brings a new cumulative update KB4519338 for Windows 10 1809 users on 8th October 2019. This is basically a security patch that takes the existing OS to build 17763.806 along with updating IE, Edge, and Windows Components. Furthermore, KB4519338 addresses a printing issue that some users have recently encountered in the previous build. 

Users may grab this Tuesday patch update through Windows Update or Windows Server Update Services (WSUS) automatically. The company resolves a long-time occurring error which shortens CPU utilization as well as decreases connection latency. Moreover, like all other patch updates, KB4519338 replaces its preceding updates.


Fixes and Improvements

Here, we depict the key features that came along with the KB4519338 security update-

  • After updating to Build 17763.806, users may utilize the CPU to the fullest along with increased connection latency. Prior to this build, there was an issue on the security bulletin CVE-2019-1318 that restricts client or server computers from supporting Extended Master Secret (EMS) RFC 7627. The above error arises primarily when you perform a full Transport Layer Security (TLS) handshake from devices that don’t support EMS, especially on servers. Since 2015, the core team has enabled EMS support for all of the supported Windows 10 versions. This becomes a necessity when you upgrade your OS to Windows 10 19H2 or upcoming monthly updates.
  • Improves the anomaly that lets any application or printer driver uses the Windows JavaScript engine (jscript.dll) to perform print jobs.
  • Rolls security updates for the following-
    • Windows Server
    • Microsoft Scripting Engine
    • Internet Information Services
    • Windows Kernel
    • Microsoft JET Database Engine
    • Windows Authentication
    • Windows Cryptography
    • Microsoft Edge
    • Internet Explorer
    • Windows Storage and File-systems

KB4519338 – Known Issues

There may appear the following issues after installing this cumulative update on your device-


Note: Microsoft is working on a resolution and will provide an update in an upcoming release.

How to get this Update

We suggest you download the KB4521862 servicing stack update before proceeding to install the latest cumulative update. KB4519338 also ensures no bug appears during the whole update process. You may get this patch update through following ways-

1. Windows Update

Navigate to Settings > Update & Security > Windows Update and tap “Check for Updates” button.

2. Microsoft Update Catalog

Download the standalone package.