You likely have installed KB5124008 update. Some other users reported similar issue after that update. So you can uninstall KB5124008 update to fix the issue that it causes. The KB5124008 update fixes a large number of vulnerabilities, including actively exploited zero‑days. Uninstalling it significantly reduces your security posture, so you should only uninstall and test if microphone (or other critical features) doesn't work and you need them. Here are the release notes: https://support.microsoft.com/en-us/servicing/os/windows-11/2026/09/kb5124008-windows-11-24h2-25h2-security-update
In case you want to uninstall:
- Open Settings > Windows Update > Update history > Uninstall updates.
- Uninstall KB5124008
- Pause Windows Update so it doesn’t get reinstalled, and resume it later when Microsoft has fixed it in an upcoming update.