Download KB4577671 Offline Installer Windows 10 v1909 v1903

As part of patch Tuesday, Microsoft released a new update for Windows 10 v1909 & v1903. Here’re the KB4577671 download links.

Along with KB4579311 for Windows 10 v2004 users, Microsoft also released another cumulative update for called KB4577671 for Windows 10 v1909 and v1903 users. Just like the other update, KB4577671 is also a security update. Depending on the system, the update may also install other improvements and fixes along with the security patches. According to the KB4577671 changelog, the update fixes security bugs like win32k, System32 folder, Windows virtualization, Windows Kernal, Windows Authentication, and more. Being a security update, it is recommended that you install the update as soon as possible to avoid any security complications.

Along as you did not pause auto updates, the update should be installed automatically. You can install the update from the Settings app itself. All you have to do is, go to the “Settings → Update & Security→ Windows Update” page and click the “Check for updates” button.

Alternatively, use the links below to download KB4577671 offline installer. This is particularly useful to install it on an offline computer or if the auto-update is not working as it should.

Download KB4577671 Offline Installer

To make things easier for you, I found the direct download links for KB4577671 for both Windows 10 32-bit and 64-bit systems. Depending on your system type, download the update using the below links and install it like any other Windows software. After installing, restart the system and you are good to go.

For v1903:

KB4577671 x84 (32-bit) offline installer (download size: 216.3 MB)

KB4577671 x64 (64-bit) offline installer (download size: 411.0 MB)

For v1909:

KB4577671 x86 (32-bit) offline installer (download size: 216.3 MB)

KB4577671 x64 (64-bit) offline installer (download size: 411.0 MB)

If you want KB4577671 download links for Windows Server, ARM64 based systems, or some other version then go to the Microsoft update catalog website to find the appropriate links. All you have to do is click on the Download button next to the appropriate version.

KB4577671 Changelog

  • Addresses an issue with a possible elevation of privilege in win32k.
  • 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.
  • Addresses an issue with creating null ports using the user interface.
  • 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.

That is all.

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