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Windows 10 Final Update KB5066791 Released as Microsoft Ends Official Support

Microsoft has officially rolled out KB5066791, marking the final cumulative update for Windows 10 as mainstream support concludes. This update brings crucial security improvements and bug fixes while transitioning users to extended security options or newer operating systems.

Microsoft has officially released KB5066791 as the final cumulative update for Windows 10, bringing an end to mainstream support for the decade-old operating system. This significant milestone arrives during this month’s Patch Tuesday cycle, representing the last “B release” for the popular OS that has served millions of users worldwide since its initial launch.

What KB5066791 Delivers in Windows 10’s Final Update

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Windows 11 October 2025 Patch Tuesday Updates: KB5066835 and KB5066793 Security Fixes and Improvements

Microsoft has deployed its October 2025 Patch Tuesday updates for Windows 11 versions 25H2, 24H2, 23H2, and 22H2. These critical updates address security vulnerabilities, fix browser printing issues, resolve gaming input problems, and introduce compatibility changes including driver removals. Users should install these updates promptly to maintain system security and stability.

Microsoft has officially released its October 2025 Patch Tuesday updates for all supported versions of Windows 11, marking another crucial monthly security deployment. The updates, identified as KB5066835 for Windows 11 25H2 and 24H2, and KB5066793 for versions 23H2 and 22H2, deliver essential security patches alongside numerous functional improvements and bug fixes. These updates continue Microsoft’s commitment to maintaining the security and reliability of its flagship operating system across all supported builds.

Update Details and Build Numbers

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Windows 10 Support Ends: Millions of PCs Face Security Risks

Windows 10 support officially ended on October 14, 2025, cutting off security updates for millions of PCs. Strict Windows 11 hardware requirements create upgrade challenges. Users must act to protect vulnerable systems.

Windows 10 Reaches End of Life After Decade of Service

Microsoft’s Windows 10 operating system reached its official end of support date on October 14, 2025, concluding a remarkable 10-year run that began July 29, 2015. The platform maintained incredible popularity even four years after Windows 11’s release, serving both consumer and business segments of the massive installed base of Windows users worldwide.

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Microsoft 365 Services Hit by Another Outage Following Recent Disruptions

Microsoft 365 users are experiencing fresh access issues as the productivity suite continues to face service disruptions. The latest outage follows recent incidents that affected Teams and Exchange Online, with Microsoft actively investigating the cause.

Microsoft 365 Faces Continued Service Disruptions

Microsoft 365 users are confronting renewed access challenges as the productivity platform experiences another significant service outage. This marks the latest in a series of disruptions that have plagued the Microsoft 365 ecosystem in recent weeks, following a major incident that previously affected core applications including Teams and Exchange Online.

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Windows 11 23H2 Support Ending November 2025: Microsoft Issues Final Upgrade Warning

Microsoft has issued a final warning that Windows 11 23H2 support for Home and Pro editions ends November 11, 2025. After this date, these versions will no longer receive security updates, leaving devices vulnerable to threats. Users are urged to upgrade to Windows 11 24H2 to maintain protection.

Windows 11 23H2 Support Deadline Approaches

Microsoft is issuing its final warning to Windows 11 users that support for version 23H2 Home and Pro editions will officially terminate on November 11, 2025. According to the company’s Windows release health dashboard, these versions will no longer receive monthly security or preview updates after this critical deadline.

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Microsoft Warns of Growing ‘Shadow AI’ Use as Security Risks Across UK Workplaces

Microsoft’s new research shows 71% of UK workers admit to using unapproved AI tools, with over half doing so weekly. This Shadow AI trend poses significant data privacy and security threats while offering substantial productivity gains.

Widespread Shadow AI Adoption in UK Workplaces

New research from Microsoft reveals alarming rates of unauthorized artificial intelligence usage across UK workplaces. According to the study, approximately 71% of employees admit to using unapproved AI tools, with more than half engaging in this practice weekly. This growing trend of Shadow AI presents serious challenges for organizational security and data protection.

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Windows 11 Media Creation Tool Not Working on Windows 10, Microsoft Confirms

Microsoft has confirmed the Windows 11 Media Creation Tool is failing on Windows 10 devices. The issue affects version 26100.6584 and causes unexpected closures. Users can download Windows 11 ISO directly as a temporary solution.

Windows 11 Media Creation Tool Fails on Windows 10 Systems

Microsoft has officially confirmed that the Windows 11 Media Creation Tool is experiencing significant functionality issues when run on Windows 10 operating systems. This confirmation comes after numerous user reports across Microsoft’s official support channels and social media platforms documented the tool’s failure to operate correctly.

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Windows 10 Support Ends: Security Risks, Upgrade Options & What to Do Now

Microsoft ends Windows 10 support on October 14, 2025, leaving systems vulnerable without security patches. Discover upgrade options to Windows 11 or how to extend security updates. Protect your device from malware and cyber threats.

Windows 10 support ends: What you need to know

The time has finally arrived. Microsoft is ending support for its Windows 10 operating system on October 14, 2025, creating a major shift for millions of users as this critical deadline approaches. If you’re wondering about your next steps, we’re providing essential Windows 10 end of life guidance to help you navigate this transition securely.