January 14, 2020—KB4534303 (Monthly Rollup)

IMPORTANTVerify that you have installed the required updates listed in the How to get this update section before installing this update.

IMPORTANT Customers who have purchased the Extended Security Update (ESU) for on-premises versions of some operating systems must follow specific procedures to continue receiving security updates after extended support ends on January 14, 2020. For more information, see KB4522133

Improvements and fixes

This security update includes improvements and fixes that were a part of update KB4525244(released November 19, 2019) and addresses the following issues:

• Security updates to the Microsoft Scripting Engine, Windows Input and Composition, and Windows Storage and Filesystems.
  For more information about the resolved security vulnerabilities, please refer to the Security Update Guide.

Known issues in this update

Microsoft is not currently aware of any issues with this update.

How to get this update

Before installing this update****Prerequisite:You must install the updates listed below andrestart your device before installing the latest Rollup. Installing these updates improves the reliability of the update process and mitigates potential issues while installing the Rollup and applying Microsoft security fixes.

1. The April 9, 2019 servicing stack update (SSU) (KB4493730). To get the standalone package for this SSU, search for it in the Microsoft Update Catalog.
2. The latest SHA-2 update (KB4474419) released October 8, 2019. If you are using Windows Update, the latest SHA-2 update will be offered to you automatically. For more information on SHA-2 updates, see 2019 SHA-2 Code Signing Support requirement for Windows and WSUS.
   After installing the items above, Microsoft strongly recommends that you install the _latest _SSU (KB4536953). If you are using Windows Update, the latest SSU will be offered to you automatically. To get the standalone package for the latest SSU, search for it in the Microsoft Update Catalog. For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.Install this update****Release Channel|Available|Next Step
   —|—|—
   Windows Update and Microsoft Update| Yes| None. This update will be downloaded and installed automatically from Windows Update.
   Microsoft Update Catalog| Yes| To get the standalone package for this update, go to the Microsoft Update Catalog website.
   Windows Server Update Services (WSUS)| Yes| This update will automatically sync with WSUS if you configure Products and Classifications as follows:Product: Windows Server 2008 Service Pack 2Classification: Security Updates File informationFor a list of the files that are provided in this update, download the file information for update 4534303.