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Whats new on latest Windows 10 update KB4577671 and KB4577668?

posted on Filed Under: Windows

Microsoft has rolled out Security update KB4577671 for devices running Windows 10 version 1909 and 1903 that advance OS Builds 18363.1139 and 18362.1139. Also, there are new KB4577668 (OS Build 17763.1518) available devices still running Windows 10 version 1809, October 2018 Update. This is part of the October 2020 cumulative update that brings minor security updates including other quality improvements.

Note: If you are running the latest Windows 10 version 2004, KB4579311 (OS Build 19041.572) available for your device with security and non-security fixes.

Download Windows 10 KB4577671

This is an important update that downloads and installs automatically. Also, you can manually install KB4577671 following the steps below.

  • Press Windows + X and select Settings (Windows + I)
  • Click on Update & Security
  • Select Windows update on the left-hand side
  • Then click on Check for updates button, to allow download of KB4577671 from the Microsoft server
  • Once done you need restart your PC to apply them

windows update for windows 10

Well if you are looking to download KB4577671 offline package then you can get it by following the link is given below.

Windows 10 KB4577671 Offline Download link:

If you’re running version 1903, use these links:

If you are looking for the latest Windows 10 ISO click here.

Windows 10 KB4577671

Note: Windows 10, versions 1903 and 1909 share a common core operating system and an identical set of system files. As a result, KB4577671 applicable for both Windows 10, versions 1903 and 1909 that bumps OS Builds 18362.1082 and 18363.1082)

As per the official Microsoft support site, KB4577671 Addresses a Group Policy issue that could cause it to delete critical files if the policy “Delete local user profile” was enabled.

  • Addresses an issue with the Group Policy service that might recursively delete critical files in alphabetic order from %systemroot%\system32. This issue occurs when a policy has been configured to delete cached profiles. These file deletions might cause stop error “0x5A (CRITICAL_SERVICE_FAILED)” boot failures.

Fixed an issue with a possible elevation of privilege in win32k

Addresses an issue with creating null ports using the user interface.

Brings security updates to Windows App Platform and Frameworks, Microsoft Graphics Component, Windows Media, Windows Shell, Windows Cloud Infrastructure, Windows Fundamentals, Windows Authentication, Windows Virtualization, Windows Kernel, and Windows Storage and Filesystems.

Known issues

  • When updating to Windows 10, version 1903 or Windows 10, version 1909 from any previous version of Windows 10, you might receive a compatibility report dialog with “What needs your attention” at the top and the error, “Continuing with the installation of Windows will remove some optional features. You may need to add them back in Settings after the installation completes.”
  • When installing a third-party driver, you might receive the error, “Windows can’t verify the publisher of this driver software”.
  • You might also see the error, “No signature was present in the subject” when attempting to view the signature properties using Windows Explorer.

Windows 10 KB4577668

Devices running Windows 10 version 1809 aka October 2018 update receive new update KB4577668 that advance windows 10 Build 17763.1518.

  • Fixed an issue with a possible elevation of privilege in win32k.
  • Fixed a Group Policy issue that could cause it to delete critical files if the policy “Delete local user profile” was enabled.
  • Fixed an issue that created a Null port using the user interface.
  • Fixed an issue that caused apps that use Dynamic Data Exchange (DDE) to stop responding when closing the app.
  • Security updates to Windows App Platform and Frameworks, Microsoft Graphics Component, Windows Media, Windows Shell, Windows Cloud Infrastructure, Windows Fundamentals, Windows Authentication, Windows Virtualization, Windows Kernel, and Windows Storage and Filesystems.

Also, Microsoft lists known Issues in KB4577668

When installing a third-party driver, you might receive the error, “Windows can’t verify the publisher of this driver software”.

You might also see the error, “No signature was present in the subject” when attempting to view the signature properties using Windows Explorer.

  • you may receive the error, “0x800f0982 – PSFX_E_MATCHING_COMPONENT_NOT_FOUND.” if  Asian language packs installed on your device.

To fix the problem the company suggests, uninstall and reinstall any recently added language packs. Select Check for Updates and install the April 2019 Cumulative Update. If reinstalling the language pack does not mitigate the issue, reset your PC as follows:

  1. Go to the Settings app > Recovery.
  2. Select Get Started under the Reset this PC recovery option.
  3. Select Keep my Files.

If you face any difficulty installing the KB4577668 update, windows update stuck downloading, KB4577668 update failed to install Check our Windows 10 update troubleshooting guide.

Windows 10 KB4577032

The April 2018 Update (version 1803) is getting updated KB4580330 that bumps OS Build 17134.1792. Also, Microsoft has noted ending support for Windows 10 version 1803 home and pro editions. Well, enterprise and education editions receive support until November 10, 2020.

  • Fixed daylight savings time for Fiji Islands.
  • Administrators may disable JScript in security zones.
  • Internet Explorer 11 will show a notification that Flash support ends in December 2020.
  • Fixed an unnamed issue in Microsoft Edge’s IE Mode that occurred when Configure enhanced hang detection for Internet Explorer mode was enabled.
  • Fixed an issue that created a Null port.
  • Fixed an issue with a possible elevation of privilege in win32k.
  • Fixed a Group Policy issue that could cause it to delete critical files if the policy “Delete local user profile” was enabled.
  • Security updates to Windows App Platform and Frameworks, Microsoft Graphics Component, Windows Media, Windows Fundamentals, Windows Authentication, Windows Virtualization, Windows Kernel, and Windows Storage and Filesystems.

Known issue:

When installing a third-party driver, you might receive the error, “Windows can’t verify the publisher of this driver software”. You might also see the error, “No signature was present in the subject” when attempting to view the signature properties using Windows Explorer.

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