Windows 10 KB4577063 download

Windows 10 update KB4577063 releases for version 2004 (preview)

The KB4577063 update is now available as a preview for Windows 10 version 2004 to fix a slew of issues, and here's all you need to know.

Microsoft is rolling out the update KB4577063 as an optional update for PCs running the Windows 10 version 2004. This is the seventh quality update for this version, and it’s available as preview with a slew of fixes and improvements that are expected to ship later this month.

KB4577063 bumps the version number to build 19041.546, and according to the company fixes a problem with spatial sound in games and adds alert about Internet Explorer 11 will drop support of Adobe Flash in December. Also, the quality update improves various aspects of the Windows Mixed Reality, including reduction of distortions and aberrations for headsets, ensures headsets meet minimum hardware requirements and sets 90Hz as the default refresh rate, and brings support for some new motion controllers.

Update KB4577063 for Windows 10 version 2004

Microsoft has announced KB4577063, and it’s referred as “October 1, 2020—KB4577063 (OS Build 19041.546) Preview” If you’re already running the May 2020 Update, this update will address these problems:

  • Adds a notification to Internet Explorer 11 that informs users about the end of support for Adobe Flash in December 2020.
  • Updates the configuration of Windows Hello Face recognition to work well with 940nm wavelength cameras.
  • Reduces distortions and aberrations in Windows Mixed Reality head-mounted displays (HMD).
  • Ensures that new Windows Mixed Reality HMDs meet minimum specification requirements and default to a 90Hz refresh rate.
  • Suspends uploads and downloads from peers when a VPN connection is detected.
  • Removes the HTTP call to “” that the Remote Desktop Client (mstsc.exe) makes at sign out when using a Remote Desktop Gateway.
  • Adds support for certain new Windows Mixed Reality motion controllers.
  • Allows the “DeviceHealthMonitoring” Cloud Service Plan (CSP) to run on Windows 10 Business and Windows 10 Pro editions.
  • Updates 2021 time zone information for Fiji.
  • Restores the constructed attribute in Active Directory and Active Directory Lightweight Directory Services (AD LDS) for msDS-parentdistname.
  • Adds an Azure Active Directory (AAD) Device Token that is sent to Windows Update (WU) as part of each WU scan.
  • Addresses an issue that fails to log events 4732 and 4733 for Domain-Local group membership changes in certain scenarios.
  • Fixes a problem that, in some instances, prevents the Language Bar from appearing when the user signs in to a new session. 
  • Addresses an issue in which selecting I forgot my Pin from Settings > Accounts > Sign-in options fails in a Windows Hello for Business On-Premise deployment.
  • Fixes a problem with certain WWAN LTE modems that might show no internet connection in the notification area after waking from sleep or hibernation.
  • Addresses an issue in Windows Subsystem for Linux (WSL) that generates an “Element not found” error when you try to start WSL.
  • Fixes a problem that might prevent apps from opening or cause other errors when apps use Windows APIs to check for internet connectivity and the network icon incorrectly displays “No internet access” in the notification area. 
  • Addresses an issue that might cause Windows 10 devices that enable Credential Guard to fail authentication requests when they use the machine certificate.
  • Fixes a problem that displays an error that states that a smart card PIN change was not successful even though the PIN change was successful.

This update includes a lot more fixes and changes, and you can check them all in the Windows support site.

You can download the updates to install them manually for version 2004 with the links below:

Uninstall update KB4577063 to fix problems

If the KB4577063 update is causing issues on your device, you can always uninstall it to revert the changes.

To uninstall KB4577063 or any other quality update on Windows 10, use these steps:

  1. Open Start.

  2. Search for Command Prompt, right-click the top result and select the Run as administrator option.

  3. Type the following command to view the update history and press Enter:

    wmic qfe list brief /format:table
  4. Check the Windows Update history of your device, and identify the update by its HotFixID and InstalledOn information.

  5. Type the following command to uninstall the update from your computer and press Enter:

    wusa /uninstall /kb:4577063

    In the command, replace “4577063” for KB number that correspond to the update that you’re trying to uninstall. For example, if you’re trying to uninstall update KB4577063, then the number that you can have to use in the command is “4577063.”

  6. Click the Yes button.

  7. Continue with the on-screen directions (if applicable).

Once you complete the steps, the recently installed update will be removed from your computer fixing any issues as a result of the release.

If your computer won’t boot after installing 4577063, you can remove update from the Advanced startup environment using these steps.

Download September 2020 update for Windows 10

The release of the update is optional, and you can always install it going to Settings Update & Security > Windows Update, and then open the Optional updates settings page to find and download the update. You can find more details about the most recent updates in the Windows 10 update history tracker guide.

About the author

Mauro Huculak is a Windows How-To Expert who started Pureinfotech in 2010 as an independent online publication. He has also been a Windows Central contributor for nearly a decade. Mauro has over 14 years of experience writing comprehensive guides and creating professional videos about Windows and software, including Android and Linux. Before becoming a technology writer, he was an IT administrator for seven years. In total, Mauro has over 20 years of combined experience in technology. Throughout his career, he achieved different professional certifications from Microsoft (MSCA), Cisco (CCNP), VMware (VCP), and CompTIA (A+ and Network+), and he has been recognized as a Microsoft MVP for many years. You can follow him on X (Twitter), YouTube, LinkedIn and Email him at [email protected].