With the release of Windows 11 KB5031455, Microsoft has released all the new features of Windows 11 Moment 4 Update to a wider audience. Now, let’s read this post on MiniTool and learn details about this new optional update, as well we how to download & install it on your PC.

Microsoft Released KB5031455 for Windows 11

Recently, a new preview update – Windows 11 KB5031455 came out to the public. As a cumulative update, it is part of Microsoft’s “optional non-security preview updates” schedule that is launched on the fourth week of every month. According to Microsoft, this optional update is also available to all customers of Windows 11 22H2 including those in Release Preview.

KB5031455 advances the OS Build to Windows 11 Build 22621.2506 and it enables many new features of Moment 4 Update by default, for example, the new System Components section of Settings, Copilot, etc.

These features are not minor tweaks but bring noteworthy changes and improvements to the operating system, which involves many areas of Windows 11 – from the Start menu to Taskbar, through File Explorer and Settings to accessibility and beyond.

In addition to new features of Windows 11 Moment 4 Update, Windows 11 KB5031455 includes quality improvements:

  • Adds new customization options for Dynamic Lighting OEMs
  • Changes the English name of the former Republic of Turkey and the new one is the Republic of Türkiye.
  • Supports daylight saving time (DST) changes in Syria
  • Supports the currency change in Croatia from the Kuna to the Euro
  • Fixes a memory leak in ctfmon.exe and TextInputHost.exe.
  • Fixes a Firewall configuration service provider (CSP) issue.
  • Fixes an issue that affects fontdrvhost.exe, Dynamic Lighting, the Windows Firewall Profile, Outlook, cellular settings, PowerShell versions greater than 7.3.1, the Device Management (DM) client, etc.

To know more highlights and improvements of Windows 11 KB5031455, see the document in this KB article.

KB5031455 Download & Install

In conclusion, KB5031455 is the first update to ship with all Moment 4 Update features enabled by default. If you skipped Moment 4 on September 26, go to get the KB update. If you have already Moment 4, you can also install it to get the improvements above.

Before you install Windows 11 Build 22621.2506 (KB5031455), we advise you to create a backup for your PC to avoid system issues caused by the potential update issues. To do this thing, run this professional PC backup software – MiniTool ShadowMaker. Then, follow the guide - How to Back up Windows 11 (Focuses on Files & System).

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Via Windows Update

To install Windows 11 KB5031455 Build 22621.2506, you can visit Windows Update:

Step 1: Press Win + I to open Settings.

Step 2: Navigate to Windows Update and check for updates. Make sure that you enable the option of Get the latest updates as soon as they’re available.

Step 3: Find 2023-10 Cumulative Update Preview for Windows 11 Version 22H2 for x64-based Systems (KB5031455) and click the button to download and install it.

KB5031455 download


Step 4: Restart your PC to finish the update operations.

 Via Microsoft Update Catalog

In addition, you can get this KB update via Microsoft Update Catalog. Now, see a guide on Windows 11 KB5031455 download & install:

Step 1: Open a web browser and visit the site – https://www.catalog.update.microsoft.com/home.aspx.

Step 2: Search for KB5031455 via the search box and then click the Download button next to the package that matches your system.

In terms of KB5031455 update size, the 64-bit package is 597.9MB while the arm64-bit version is 720.7MB.
download KB5031455

Step 3: Click the download link to get the .msu download file.

Step 4: Double-click on this file and finish the installation by following the instructions on the screen.



That’s the basic information on Windows 11 KB5031455 including its new features & improvements, as well as how to download and install this update on your PC. To enjoy all the features of Moment 4 enabled by default in this KB update, get it now.

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