preview update Archives

Winsage

October 8, 2026

Microsoft discloses bug in Windows 11 September update causing apps using Dolby Digital to crash

On October 2, Microsoft announced that its optional preview update "KB5124010," released on September 22, causes crashes in applications using the Dolby Digital (AC-3) codec on Windows 11 versions 24H2, 25H2, and 26H2. The update does not include security fixes and affects media players, games, and certain line-of-business applications that rely on Windows' built-in AC-3 audio decoding. Symptoms include applications failing to launch or crashing during specific features like music playback. Users can check if they are affected by verifying their OS version, installed updates, and application implementation. Microsoft plans to address the issue in a future update, but a timeline is not provided. Users can uninstall KB5124010 or pause updates as temporary solutions. The update has already caused issues for the game "WARDOGS," leading to compatibility investigations by the publisher, Team17.

Winsage

October 4, 2026

Windows 11 24H2/25H2/26H2: Problems with preview update KB5124010

On September 22, 2026, Microsoft released the optional Preview Update KB5124010 for Windows 11 versions 24H2, 25H2, and 26H2, aimed at enhancing performance and addressing various issues, with broader distribution planned for October 2026. User feedback indicated concerns about complications from the update. A user reported that applications were crashing due to issues with the library file msmpeg2ac3dec.dll when multiple MP3 files were played simultaneously, affecting older games like SimCity 4 and Fallout New Vegas. The user's company’s telephone system, using innovaphone, also experienced crashes with the myApps client. The msmpeg2ac3dec.dll file was found only on systems upgraded from Windows 11 22H2, while fresh installations of 24H2 or 25H2 did not include it. A workaround involving the installation of "LAV Filters" was tested and found to resolve the crashing issue. Microsoft acknowledged the issues related to the Preview Update KB5124010, stating that applications requiring AC-3 audio decoding might close unexpectedly and that they are working on a resolution for this problem in a future update.

Winsage

September 28, 2026

Windows 11 preview update causes black screen after sign-in; Microsoft publishes workaround

On September 24, Microsoft reported an issue affecting devices that installed the August 27 preview update for Windows 11, causing a black screen after sign-in and preventing the desktop from loading correctly. This issue primarily impacts Azure Virtual Desktop (AVD) hosts using FSLogix with existing user profiles. The affected OS versions are Windows 11 versions 26H1, 25H2, and 24H2, and the causal update is KB5120998. Microsoft has issued interim workarounds, including a manual desktop launch and a Known Issue Rollback (KIR), which will be automatically delivered to non-enterprise devices. Affected enterprise-managed devices require manual deployment of the KIR policy. The black screen issue is part of a series of update-related problems for Windows 11 in 2026, while Windows 10 has experienced fewer issues during the same timeframe.

Winsage

September 25, 2026

Windows update leaves some virtual desktops staring into the void

Microsoft has acknowledged an issue affecting some Windows 11 users utilizing virtual desktops, where a black screen appears after sign-in, requiring manual launch of Explorer to regain access. This glitch is linked to devices operating on the August 2026 non-security preview update or later. It has been predominantly observed on Azure Virtual Desktop (AVD) hosts using FSLogix, with crashes of Windows Explorer noted in the Application event log. A temporary workaround involves using Task Manager to initiate explorer.exe as a new task. Microsoft has implemented a Known Issue Rollback (KIR) via Group Policy to disable the problematic change until a permanent fix is released. Versions 26H1, 25H2, and 24H2 of Windows 11 are affected, while Windows 10 and Windows Server do not appear to be impacted.

Winsage

September 25, 2026

Windows 11 KB5124010 update released with 46 changes and fixes

Microsoft has released the KB5124010 September 2026 non-security preview update for Windows 11 versions 24H2 and 25H2, introducing 46 enhancements, including improvements to Bluetooth functionality and the ability to remap the Copilot key. This update is optional and focuses on quality improvements without security fixes. Key features include support for Emoji 17.0, a new accessibility setting for maximizing app windows, and a recovery remote management plug-in. Bluetooth issues have been addressed, including crashes related to audio streaming and microphone compatibility. Users can remap the Copilot key to function as the Right Ctrl or Context Menu key. The update elevates Windows 11 25H2 and 24H2 devices to builds 26200.9550 and 26100.9550, respectively. Other highlights include the ability to use slideshow wallpapers across multiple desktops, enhanced gesture controls for precision touchpads, and a Camera roll backup feature for OneDrive. Microsoft has fixed a known issue with the File History backup feature and removed the PC-to-PC Migration tool, recommending Windows Backup instead. KB5124010 is the last preview update for Windows 11 24H2, which will reach end of support in October 2026.

Winsage

September 25, 2026

Sorry Microsoft. Windows 10 is more stable than Windows 11, and your recent updates have made it obvious

Windows 11's September update, released on the 8th, has caused various issues, including problems with Remote Desktop, USB audio, and Linux/WSL applications. Failures in File History, crashes of Explorer.exe, and instability with AMD GPUs were also reported. An emergency update was issued on September 14 but did not resolve all issues. Over nine months, Windows 11 updates have resulted in numerous bugs, while Windows 10 has experienced significantly fewer issues. Specific problems with Windows 11 included black screens and authentication issues in January, Microsoft account sign-in issues in March, BitLocker recovery problems in April and May, boot failures in June, and compatibility problems in July. August saw game crashes linked to third-party drivers, and September was marked by extensive issues requiring an emergency update. Windows 10 continues to receive updates and has a commitment to Extended Security Updates until October 12, 2027. The stability of Windows 10 is attributed to fewer significant changes compared to the ongoing enhancements in Windows 11.

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.

Winsage

September 17, 2026

Microsoft Confirms Windows 11 Speed Fixes Are Coming to All Users

Windows 11 users have experienced delays in File Explorer and the Start menu since the operating system's launch in 2021. Recent reports from Windows Insiders indicate significant improvements in system responsiveness, confirmed by Marcus Ash from Microsoft, who stated that these enhancements will be rolled out to all users by fall 2026. Recent cumulative updates have addressed issues like File Explorer lag and Start menu stuttering, with specific updates (KB5120998, KB5095093, and KB5089573) improving responsiveness and reducing micro-stutters. Enhancements to the taskbar, Start menu, and context menus are also being developed, including taskbar repositioning and streamlined context menus. Users on the 25H2 version can expect these improvements through cumulative updates before the 26H2 update this fall. Keeping Windows Update active will ensure access to these enhancements.

Winsage

September 12, 2026

Windows 11’s useless Copilot key finally does something, you can map it to right-click

Recent updates from Microsoft allow users to remap the Copilot key on Windows 11 to either the Right Ctrl key or the Context Menu key. This feature is part of the Release Preview Build 26100.9539 for 24H2 and 26200.9539 for 25H2, rolled out on September 10, 2026. Users can access this remapping option under Settings > Bluetooth & devices > Keyboard. The Copilot key was introduced in January 2024 but received criticism for being cumbersome. Microsoft acknowledged the challenges posed by the Copilot key, particularly for users relying on the Right Ctrl or Context Menu keys for shortcuts and assistive technologies. If remapped to the Right Ctrl key, certain shortcut combinations may not function as expected. The feature is expected to be fully rolled out on October 12, 2026.

Winsage

September 12, 2026

Microsoft warns that killing VBScript could break Windows activation for businesses

Microsoft is phasing out VBScript and urging organizations to transition to PowerShell. The Slmgr.vbs tool, used for managing Windows activation, will lose functionality as VBScript is deprecated. Slmgr.vbs allows users to install product keys, activate Windows, and check licensing status. VBScript will soon only be available as a Feature on Demand, requiring manual installation in future updates. PowerShell's OSLicense module offers similar capabilities to Slmgr.vbs for managing activation information. The OSLicense module is available for Windows 11 users after the August 2026 Preview update and will be supported in the next major release of Windows Server. Organizations are advised to review their existing scripts and tools to adapt to this transition.