KB4520004 and KB4520010 for Windows 10 1709 & 1703 – 08 Oct 2019

Microsoft rolls KB4520004 and KB4520010 cumulative updates for Windows 10 1709 and 1703 respectively.  KB4520004 upgrades the existing 1709 OS to Build 16299.1451 whereas KB4520010 updates 1703 version OS to Build 15063.2108. Moreover, the Tuesday patch reveals quality fixes and enhancements such as support Extended Master Secret (EMS) RFC 7627, improves Bluetooth hardening updates, etc.

Additionally, the company introduces the Windows JavaScript engine to process print jobs. Further, the team improves the security of Chromium and Explorer in addition to updating the sorting and managing files option. You may download KB4520004 and KB4520010 as .msi files as well by clicking upon the link provided in this guide. Moreover, here is the complete list of Windows 10 cumulative updates.

KB4520004 and KB4520010

General changes and Improvements 

Cumulative Update Changes/ Improvements
KB4520004, KB4520010
  • Works upon a bug that minimizes connection latency as well as CPU utilization. The above bug appears when you perform a full Transport Layer Security (TLS) handshakes from devices that don’t support EMS, especially on servers. Microsoft has included EMS support for different versions since 2015 and may bring forced increments after you update your PC to Windows 10 19H2.
  • Rectifies an issue with applications and printer drivers that utilize the Windows JavaScript engine (jscript.dll) for processing print jobs.
  • Rolls security updates for the following-
    • Windows Shell
    • Windows Kernel
    • Microsoft Edge
    • Internet Explorer
    • Windows Cryptography
    • Windows Authentication
    • Microsoft JET Database Engine
    • Windows Datacenter Networking
    • Windows Storage and Filesystems
    • Microsoft Scripting Engine
    • Windows Server
    • Windows App Platform and Frameworks
KB4520004 only
  • Works upon the Keyboard Lockdown Subsystem bug that earlier doesn’t filter key input correctly.
  • After installing 13 Aug 2019 Bluetooth hardening updates, there appears an error message “0x133 DPC_WATCHDOG_VIOLATION”. The company has resolved this issue on this patch.

Known Issues on KB4520004 and KB4520010

Symptom Workaround

On executing certain operations like renaming of files and folders, this may prompt the following error message –


This bug occurs when you don’t sign in as Admin, still carry out these actions on a Cluster Shared Volume.

To resolve this bug, perform the operation using-

  • A procedure that has admin rights.
  • A node that doesn’t require CSV ownership.

The Company may release a permanent solution to this very soon as they are currently working on a resolution.

How to get KB4520004 and KB4520010

Before proceeding further, make sure to install the following Servicing stack updates on your PC-

1. Through Windows Update

You will auto receive the new patch update KB4520004 and KB4520010 on your respective Windows 10 1700 series PCs through Windows Update. Besides, you can manually download the patch update as well by visiting the following address-

Settings (Win+I) > Update & Security > Windows Update

After you reach the above location, press Check for updates option.

2. Through the Update Catalog

Download Standalone Package for Windows 10 version: 1709, 1703.

3. Via Windows Server Update Services (WSUS)

If you configure Products and Classifications as described below, KB4520004 and KB4520010 will auto-synchronize with WSUS.

  • Product: Windows 10
  • Classification: Security Updates

Source: KB4520004 and KB4520010