July 8, 2025—KB5062561 (OS Build 10240.21073)

July 8, 2025—KB5062561 OS Build 10240.21073 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 past...

May 13, 2025—KB5058387 (OS Build 10240.21014)

May 13, 2025—KB5058387 OS Build 10240.21014 Support for Windows 10 has ended on October 14, 2025 After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work, but we recommend...

May 13, 2025—KB5058392 (OS Build 17763.7314)

May 13, 2025—KB5058392 OS Build 17763.7314 Support for Windows 10 has ended on October 14, 2025 After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work, but we recommend...

July 8, 2025—KB5062557 (OS Build 17763.7558)

July 8, 2025—KB5062557 OS Build 17763.7558 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 past...

July 8, 2025—KB5062554 (OS Builds 19044.6093 and 19045.6093)

July 8, 2025—KB5062554 OS Builds 19044.6093 and 19045.6093 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 device...

July 8, 2025—KB5062560 (OS Build 14393.8246)

July 8, 2025—KB5062560 OS Build 14393.8246 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 past...

Patch, track, repeat

Welcome to this week's edition of the Threat Source newsletter. We've made it halfway through 2025 already! It's been a while since I last wrote about CVEs and how free support for Windows 10 will end on October 14, 2025, leaving you with no more security fixes. While the CVE system remains the...

June 10, 2025—KB5060531 (OS Build 17763.7434)

June 10, 2025—KB5060531 OS Build 17763.7434 Important Windows updates do not install Microsoft Store application updates. If you are an enterprise user, see Microsoft Store apps - Configuration Manager. If you are a consumer user, see Get updates for apps and games in Microsoft Store. ​​​​​​​For...

KB5062799: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: July 8, 2025

KB5062799: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: July 8, 2025 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 o...

KB5060954: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: June 10, 2025

KB5060954: Servicing stack update for Windows 10, version 1607 and Windows Server 2016: June 10, 2025 Support for Windows 10 has ended on October 14, 2025 After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes fo...

KB5058527: Servicing stack update for Windows 10: May 13, 2025

KB5058527: Servicing stack update for Windows 10: May 13, 2025 Support for Windows 10 has ended on October 14, 2025 After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work,...

KB5055664: Servicing stack update for Windows 10: April 9, 2025

KB5055664: Servicing stack update for Windows 10: April 9, 2025 Support for Windows 10 has ended on October 14, 2025 After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work,...

April 8, 2025—KB5055519 (OS Build 17763.7136) - EXPIRED

April 8, 2025—KB5055519 OS Build 17763.7136 - 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 10...

April 8, 2025—KB5055518 (OS Builds 19044.5737 and 19045.5737) - EXPIRED

April 8, 2025—KB5055518 OS Builds 19044.5737 and 19045.5737 - 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 9, 2025—KB5055547 (OS Build 10240.20979) - EXPIRED

April 9, 2025—KB5055547 OS Build 10240.20979 - EXPIRED EXPIRATION NOTICEIMPORTANT As of January 27, 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...

KB5055661: Servicing stack update for Windows 10, version 1607 and Server 2016: April 8, 2025

KB5055661: Servicing stack update for Windows 10, version 1607 and Server 2016: April 8, 2025 Support for Windows 10 has ended on October 14, 2025 After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Window...

March 11, 2025—KB5053618 (OS Build 10240.20947)

March 11, 2025—KB5053618 OS Build 10240.20947 Support for Windows 10 has ended on October 14, 2025 After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work, but we recommend...

March 11, 2025—KB5053606 (OS Builds 19044.5608 and 19045.5608) - EXPIRED

March 11, 2025—KB5053606 OS Builds 19044.5608 and 19045.5608 - 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. ---...

March 11, 2025—KB5053594 (OS Build 14393.7876)

March 11, 2025—KB5053594 OS Build 14393.7876 Support for Windows 10 has ended on October 14, 2025 After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windows 10. Your PC will still work, but we recommend...

KB5054006: Servicing stack update for Windows 10, version 1607 and Server 2016: March 11, 2025

KB5054006: Servicing stack update for Windows 10, version 1607 and Server 2016: March 11, 2025 Support for Windows 10 has ended on October 14, 2025 After October 14, 2025, Microsoft will no longer provide free software updates from Windows Update, technical assistance, or security fixes for Windo...