Windows bugs and fixes October 10 2026: no fix
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TL;DR
On Windows 11, the September 2026 KB5124010 preview update made some AC-3 apps and games crash, BleepingComputer reported on October 5, 2026. No fix had shipped by October 8, 2026, and Microsoft planned to address the issue in a future Windows Update, according to Finance Biggo, published that day. I would avoid the optional preview if it is not installed; uninstalling KB5124010 is the current remedy when affected software is essential, but doing so removes the update’s other fixes.
- Windows 11 versions 26H2, 25H2, and 24H2 are affected, gHacks reported on October 6, 2026.
- KB5124010 is an optional preview released September 22, according to Finance Biggo, published October 6, 2026.
- Uninstalling is the only current remedy, but no fix timeline exists, The Register reported on October 5, 2026.
- Modern applications that include their own decoder are generally unaffected, BleepingComputer reported on October 5, 2026.
What broke after KB5124010?
KB5124010 can crash AC-3-dependent applications, BleepingComputer reported on October 5, 2026.
The Windows 11 bug affects applications and games that use the Dolby Digital AC-3 decoder built into Windows 11 versions 24H2, 25H2, and 26H2, according to PCWorld, published October 5, 2026.
An affected program may fail to launch, close without warning, or work until an audio feature such as music playback invokes AC-3 decoding, BleepingComputer reported on October 5, 2026.
Legacy software is most exposed because it is more likely to depend on Windows for decoding, while many modern applications provide their own decoding components, PCWorld reported on October 5, 2026.
Microsoft has not published a list of affected games or applications, although games, media players, and productivity applications are among the categories involved, gHacks reported on October 6, 2026.
Players described problems beginning after the September preview patch and ending when they removed it, according to TechRadar, published October 5, 2026. I would use that sequence as a diagnostic clue, not as proof that every crash has the same cause.
Has Microsoft shipped a fix?
No fix has shipped, Finance Biggo reported on October 8, 2026.
Microsoft marked the problem as confirmed and said it planned to address it in a future Windows Update, but it supplied no release date, Finance Biggo reported on October 8, 2026.
A Windows update fix was not included merely by moving from Windows 11 25H2 to 26H2, because the affected versions share the relevant code base, PCWorld reported on October 5, 2026.
Microsoft had provided neither a workaround nor a Known Issue Rollback and had not said whether a resolution would arrive with the October Patch Tuesday release, gHacks reported on October 6, 2026.
The entry shows why Windows known issues are useful to people at the keyboard, not only administrators. Microsoft’s acknowledgment identifies the triggering update, the affected Windows versions, the symptoms, and the missing resolution, according to gHacks on October 6, 2026.
For the preceding entry in my daily record, see Windows bugs and fixes October 9 2026: no fix. I would not install another update on the assumption that it contains the AC-3 repair unless its release notes name the problem.
Which Windows PCs and applications are exposed?
Older applications using Windows AC-3 decoding face the clearest risk, PCWorld reported on October 5, 2026.
The affected platforms are Windows 11 versions 26H2, 25H2, and 24H2, while Windows Server is absent from the affected-platform list, gHacks reported on October 6, 2026.
KB5124010 normally reaches a PC when a user selects “Download and install” because it is an optional preview, BleepingComputer reported on October 5, 2026.
Windows 11 24H2 devices with “Get the latest updates as soon as they’re available” enabled receive the update automatically, BleepingComputer reported on October 5, 2026.
Applications that bundle their own AC-3 decoding component should avoid the failure even when they support the older codec, while software using the Windows decoder remains exposed, gHacks reported on October 6, 2026.
DVD player applications and games that store music in AC-3 format are examples of potentially affected software, Finance Biggo reported on October 8, 2026. I would check Update History for KB5124010 when an older game, media player, or work application suddenly stops opening or closes as audio starts.
What can I do today?
Uninstalling KB5124010 is the only current remedy, The Register reported on October 5, 2026.
The cost of uninstalling is losing the other fixes included in KB5124010, while avoiding the optional preview also delays its other changes until a regular monthly update, Finance Biggo and gHacks reported on October 6, 2026.
I would first confirm that KB5124010 is installed and that the failing application uses the affected Windows audio path. If the computer works normally, I would leave it alone and wait for Microsoft to name the resolution.
If essential software fails and no replacement application is practical, I would remove KB5124010 and accept the loss of its other fixes. If KB5124010 is not installed, I would avoid selecting the optional preview until Microsoft publishes a resolution.
For any Windows KB update problem, I would identify the failing KB before repairing Windows components. Error 0x80073712 can reflect missing update files, an incomplete download, or a documented update problem rather than damage to Windows itself, according to Wintips, published October 5, 2026.
Wintips advises checking Update History and Microsoft’s documentation for the named KB before attempting Windows repair, according to its October 5, 2026 guide. That order matters because a published acknowledgment can prevent unnecessary troubleshooting while the vendor prepares the actual fix.