Updates KB4509479 (Build 17763.593) and KB4502559 for Windows 10, version 1809

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Microsoft released cumulative update KB4509479 (OS Build 17763.593) and update KB4502559 for Windows 10 October 2018 Update (version 1809) and Windows Server 2019 (1809). How to download and install a new build

Update KB4489899 (Build 17763.379) for Windows 10, version 1809

Microsoft released KB4509479 update package for Windows 10 version 1809 (October 2018 Update) based on x86, x64 (amd64), ARM64 and Windows Server 2019 (1809) processors for x64-based systems.

KB4502559, a cumulative .NET Framework 3.5 and 4.7.2 update for Windows 10, version 1809, Windows 10 LTSB and Windows Server 2019, is also available for installation.

Installing through Windows Update

Cumulative update 4509479 is installed manually through Windows Update, 4502559 – it is installed automatically. To test, go to the Options > Update and Security menu and click Check for updates.

A reboot is required to complete the installation. After the upgrade, the build number for Windows 10 will change to 17763.593.

Installing and configuring Windows 10 updates

Download updates

You can also download the KB4509479 and KB4502559 updates from the Microsoft Update Catalog and install them manually using the link below:

Download KB4509479 and KB4502559

To install an MSU file, simply double-click on the file. You can apply additional parameters (for example, /silent for a background installation) — the installation of the MSU update package.

Improvements and fixes KB4509479 (17763.593)

This update includes quality updates. New features of the system are not presented. List key changes:

  • Fixed an issue that blocked devices from connecting to some Storage Area Network (SAN) devices using the iSCSI interface after installing KB4497934. An error could appear in the Windows log with the event code 43 from the iScsiPrt source and with the following wording in the Description field: “Target failed to respond in time for a login request.”.

If you installed previous updates, this time only new changes will be applied to the cumulative package.

Known bugs

  • Some operations, such as rename, may not work for Cluster Shared Volume (CSV) and result in the error “STATUS_BAD_IMPERSONATION_LEVEL (0xC00000A5)”.
  • After installing the update KB4493509, devices on which some Asian language packs are installed may receive the error message “0x800f0982 – PSFX_E_MATCHING_COMPONENT_NOT_FOUND”.
  • It is reported that a small number of devices may encounter a black screen when they first log in after installing the update. If you encounter this problem, click Ctrl + Alt + Delete, click the Power button in the lower-right corner and select Reboot.


You can download the file below:

x64 download update
x86 download update
ARM64 download update
Windows Server 2019 download update