Download KB5009543 Offline Installer, Windows 10

The KB5009543 security update is out now for all Windows 10 users running the latest builds. Here are the direct links to download KB5009543 offline installer.

After a brief “no updates” period due to Christmas and New Year events, Microsoft finally released a new update for all Windows 10 users running v20H2, v21H1, and v21H2 versions. Unlike the regular cumulative updates, KB5009543 is a security-only update. That means the security doesn’t contain any additional improvements, feature updates, or non-security patches.

As for the security fixes, the KB5009543 update fixes an issue with Active Directory where the Lightweight Directory Access Protocol (LDAP) is causing problems when making multiple attribute changes. Additionally, Microsoft also fixed some problems with the Japanese Input Method Editor.

Other than that, the patch also updates the servicing stack which is responsible for several Windows functions like Windows Updates, features, etc.

All in all, being a security update, it is recommended that you install it as soon as possible to ensure no vulnerabilities are present in your system. In theory, the update should cause any problems because it doesn’t contain any new non-security features or improvements.

As always, the KB5009543 update should be downloaded automatically in Windows 10. If you want to, you can force update by clicking on the “Check for updates” button on the “Windows Update” page. Alternatively, use the links below to download KB5009543 offline installer. This is helpful if the automatic update is causing problems or installing the update on an offline machine.

Download KB5009543 offline installer

As always, the KB5009543 update is available as an offline installer via the Microsoft Update Catalog website.

Go to this webpage, find your Windows 10 version, and click the “Download” button next. Another window or tab will open. Here, click the available link, and the offline installer is downloaded to your computer. After downloading, double-click on the installer and follow the wizard to install KB5009543. Remember that the update will only install if it is supported. Also, it might download additional updates or dependencies if required.

KB5009543 Changelog

  • Addresses an issue that prevents Active Directory (AD) attributes from being written properly during a Lightweight Directory Access Protocol (LDAP) modify operation when you make multiple attribute changes.
  • Addresses a known issue that affects Japanese Input Method Editors (IME). When you use a Japanese IME to enter text, the text might appear out of order or the text cursor might move unexpectedly in apps that use the multibyte character set (MBCS). This issue affects the Microsoft Japanese IME and third-party Japanese IMEs.

That is it.

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