Windows 11 24H2 Archives

Winsage

September 19, 2026

Microsoft fixes bug behind ‘Defender Antivirus is turned off’ alerts

Microsoft resolved an issue that caused misleading alerts indicating that Defender Antivirus was disabled after recent updates. This fix was confirmed in an update to the Windows release health dashboard and was implemented in the Microsoft Defender Antivirus update (version 4.18.26080.4) rolled out on September 17. The bug, acknowledged by Microsoft in late August, affected users in the Release Preview Channel of the Windows Insider program since at least June and impacted all supported versions of Windows clients and servers. Users received erroneous notifications in the Windows Security app prompting them to activate Microsoft Defender Antivirus, despite it functioning correctly. Misleading alerts could appear upon Windows startup and intermittently thereafter, even when notification settings were disabled.

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September 17, 2026

Windows 11 24H2 Home and Pro reach end of support in October

Devices operating on Windows 11 24H2 Home and Pro editions will stop receiving updates starting October 13, 2026. The Enterprise and Education editions of Windows 11 24H2 will continue to receive mainstream support until October 2027. Microsoft encourages users to upgrade to Windows 11 25H2, which became available in September 2024. Systems running Windows 11 24H2 Home and Pro that are not managed by IT will automatically upgrade to Windows 11 25H2. Users can check for eligibility for the update by navigating to Settings > Windows Update. Windows Server 2022 will transition to extended support on October 13, 2026, lasting until October 14, 2031. Microsoft has extended the free Windows 10 Extended Security Updates program for home users until October 2027 and will halt security updates for Windows 11 Home and Pro 23H2 in November 2025.

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September 17, 2026

What Windows 11 KB5129195 fixes

On September 14, 2026, Microsoft released KB5129195, an out-of-band cumulative update for Windows 11 versions 24H2 and 25H2, transitioning systems to build 26100.9457 for 24H2 and 26200.9457 for 25H2. The update addresses several regressions, including failed connections and sign-ins in Remote Desktop Services, host-folder sharing failures in Plan9 file sharing for HCS-managed Linux virtual machines, and failures affecting 8-channel and 3D-audio modes in USB Audio Class 1.0. However, it does not fix ongoing issues with AMD Radeon graphics cards, such as freezes, black screens, and driver timeouts, which have affected various hardware configurations. KB5129195 is available through multiple distribution channels, including Windows Update and WSUS.

Winsage

September 16, 2026

Microsoft built a local PC-to-PC transfer tool for Windows 11, now it’s killing it to push OneDrive-based solution

Microsoft has discontinued its PC-to-PC transfer tool for Windows 11, which allowed file transfers over Wi-Fi or LAN without using OneDrive. The company has shifted its focus to the Windows Backup solution that relies on OneDrive for file storage. Users must now restore backups linked to their Microsoft accounts and retrieve synced files via OneDrive, which has a 5GB storage limit for free accounts. The PC-to-PC transfer tool, tested in July 2025, enabled users to transfer documents, photos, videos, and user settings locally, but did not support the transfer of saved passwords, credentials, or installed applications.

Winsage

September 15, 2026

30 Days Until Windows 11 24H2 Support Ends; Excel Paste Glitch Surfaces Simultaneously

Microsoft announced on September 14 that the Windows 11 24H2 edition, including Home and Pro versions, has only 30 days of support remaining, with a deadline for updates set for October 13, 2026. Users are encouraged to upgrade to version 25H2 or later to continue receiving security updates. The Enterprise and Education editions will have support until October 12, 2027. Users have reported issues from September's security updates, particularly with the Office patch KB5002914, which disrupts the copy-and-paste function in Excel across multiple versions. Microsoft has acknowledged the issue but has not yet released a fix. A temporary workaround involves manually removing the problematic patch, though this also removes the associated security fixes. Additionally, users have experienced connection drops and unresponsiveness in Remote Desktop Services (RDS) across various Windows versions, including Windows 11 26H1 and Windows Server 2012. Microsoft confirmed that related tools may also stop responding, and restarting virtual machines may temporarily restore functionality. USB audio issues have been reported on certain USB Audio Class 1.0 devices across Windows 11 versions, with users experiencing loss of audio output and corrupted sound settings. Switching to 2-channel mode has helped some users, but Microsoft has not provided a timeline for a comprehensive fix. As Windows Server 2012 nears the end of its Extended Security Updates period on October 13, 2026, the RDS issues add pressure on administrators. Users on 24H2 need to prioritize migration to 25H2, while those with the latest updates should be cautious regarding Excel and Remote Desktop functionalities.

Winsage

September 15, 2026

Microsoft Rolls Out Emergency Windows 11 Patch, But AMD GPU Driver and File Explorer Crashes Remain

Microsoft has released an emergency patch for Windows 11, identified as KB5129195, which is being automatically downloaded to address critical issues, including privilege elevation vulnerabilities. The patch fixes CVE-2026-62721 and resolves remote desktop connection problems, as well as attempts to address USB audio issues that arose after the September update. Improvements have been noted for 8-channel and 3D audio modes, but users may still face problems such as missing volume controls and lack of audio output for some USB audio devices. Additionally, unresolved issues from the September update, KB5124008, persist, particularly for AMD Radeon GPU users experiencing system freezes, crashes, and driver timeouts. Complaints about File Explorer crashing or failing to launch have also been reported, affecting certain enterprise environments. Microsoft is using internal AI tools to enhance security, but this has led to a cycle of instability in the operating system. Nearly 1,000 CVE patches were applied just before this update.

Winsage

September 11, 2026

Microsoft fixes Teams, Outlook launch failures on ARM Windows PCs

Microsoft addressed a significant bug that affected the launch of Teams and Outlook on ARM-based Windows devices after updates from the August 2026 Patch Tuesday. The issue primarily impacted users of devices like the Surface Pro 11 and Surface Laptop 7 running Windows 11 24H2 or later, who had not installed necessary updates from the Microsoft Store. The bug caused Teams and Outlook to fail to launch or close unexpectedly following the installation of security updates released on or after August 11, 2026 (KB5121003). Classic versions of Outlook and other applications were not affected. A temporary workaround was suggested, involving updating the Auto Super Resolution Package. The bug was resolved through cumulative updates released on September 8, 2026 (KB5124012), and users were urged to install the latest updates for improvements and issue resolutions. Additionally, Microsoft acknowledged other issues related to updates from August, including disruptions in printing and PDF exporting due to .NET Framework updates, gaming problems from peripherals with RGB lighting, and alerts regarding Microsoft Defender Antivirus being disabled. They also fixed issues related to the loss of custom mouse settings and desktop configurations following the installation of the KB5120998 August 2026 preview update.

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September 10, 2026

Microsoft fixes bug that wiped Windows desktop settings

Microsoft announced that the September 2026 Patch Tuesday updates resolved an issue affecting desktop settings on certain Windows devices, which caused desktop wallpapers to revert to a solid black background after the installation of the KB5120998 August 2026 preview update. This bug impacted Windows 11 24H2 and 25H2 systems, preventing the correct loading of desktop settings and also affecting mouse settings. Microsoft recommended users update their devices to the latest security update released on September 8, 2026 (KB5124008) to benefit from the fix.

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September 8, 2026

Microsoft releases Windows security update addressing 723 flaws

Microsoft released its September 2026 security updates, addressing two critical Windows elevation-of-privilege vulnerabilities: CVE-2026-85880 and CVE-2026-81963. Both vulnerabilities were exploited before their public disclosure on September 8. CVE-2026-85880 involves a heap-based buffer overflow in the Windows Advanced Local Procedure Call (ALPC), allowing low-privileged attackers to gain SYSTEM privileges. CVE-2026-81963 affects the Windows Update Stack due to improper link resolution and access controls, enabling similar privilege escalation. The September release also includes 974 Common Vulnerabilities and Exposures (CVEs) across various Microsoft products, with 723 affecting Windows. Users of Windows 11 24H2 and 25H2 receive updates via KB5124008, while Windows 11 26H1 receives KB5124012. Windows 11 24H2 Home or Pro editions will reach end of servicing on October 13, 2026. Users are advised to install the updates promptly and back up important data.

Winsage

September 4, 2026

Are Vibe-Coding and AI-Slop the cause of Windows 11 issues (desktop background, mouse pointer, etc.)?

The preview update KB5120998 for Windows 11 versions 24H2 and 25H2, released on August 27, 2026, has caused issues such as erratic mouse pointer behavior and disappearing desktop backgrounds, particularly in non-English versions. Microsoft has acknowledged these problems, indicating that they stem from coding practices that fail to load certain settings correctly. Specific issues include a "black desktop background" due to desktop settings not loading and mouse customization resetting to default configurations. The problems may be related to translation issues within the registry, as registry keys have been altered post-update. Users have suggested that manually adjusting these registry keys could restore normal functionality.