October 14, 2025—KB5066836 (OS Build 14393.8519)

October 14, 2025—KB5066836 OS Build 14393.8519 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the pa...

October 14, 2025—KB5066791 (OS Builds 19044.6456 and 19045.6456)

October 14, 2025—KB5066791 OS Builds 19044.6456 and 19045.6456 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business...

August 12, 2025—KB5063877 (OS Build 17763.7678)

August 12, 2025—KB5063877 OS Build 17763.7678 Windows Secure Boot certificate expirationImportant: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. Microsoft has been updating these certificates on consumer and non-managed business devices for the pas...

March 11, 2025—KB5053596 (OS Build 17763.7009) - EXPIRED

March 11, 2025—KB5053596 OS Build 17763.7009 - EXPIRED EXPIRATION NOTICEIMPORTANT As of March 31, 2026, this update is no longer available from the Microsoft Update Catalog or other release channels. We recommend that you update your devices to the latest version of Windows. Support for Windows 1...

July 11, 2023—KB5028166 (OS Builds 19044.3208 and 19045.3208) - EXPIRED

July 11, 2023—KB5028166 OS Builds 19044.3208 and 19045.3208 - EXPIRED EXPIRATION NOTICEIMPORTANT As of March 31, 2026, this update is no longer available from the Microsoft Update Catalog or other release channels. We recommend that you update your devices to the latest version of Windows. ---...

April 12, 2022—KB5012599 (OS Builds 19042.1645, 19043.1645, and 19044.1645)

April 12, 2022—KB5012599 OS Builds 19042.1645, 19043.1645, and 19044.1645 EXPIRATION NOTICEIMPORTAN T As of 9/12/2023, this KB is only available from Windows Update. It is no longer available from the Microsoft Update Catalog or other release channels. We recommend that you update your devices to...

September 8, 2020—KB4577032 (OS Build 17134.1726)

September 8, 2020—KB4577032 OS Build 17134.1726 NEW IMPORTANT We have heard your feedback and understand your need to focus on business continuity in the midst of the global pandemic. As a result, we have decided to delay the scheduled end-of-service date for the Enterprise, Education, and IoT...

August 11, 2020—KB4571689 (OS Build 15063.2467)

August 11, 2020—KB4571689 OS Build 15063.2467 Current status of Windows 10, version 1703 Windows 10, version 1703 has reached end of service for all editions. To continue receiving security and quality updates, Microsoft recommends updating to the latest version of Windows 10 . Surface Hub device...

July 14, 2020—KB4565489 (OS Build 17134.1610)

July 14, 2020—KB4565489 OS Build 17134.1610 NEW IMPORTANT Windows 10, version 1803 has reached the end of mainstream support and is now in extended support. Starting in July 2020, there will no longer be optional, non-security releases known as "C" releases for this operating system. Operating...

October 3, 2019—KB4524150 (OS Build 16299.1421)

October 3, 2019—KB4524150 OS Build 16299.1421 IMPORTANT This is a required security update that expands the out-of-band update dated September 23, 2019. This security update includes the Internet Explorer scripting engine security vulnerability CVE-2019-1367 mitigation and corrects a recent...