Windows 11 September Patch Triggers Audio Failure and Disables File History on Certain PCs

Microsoft's September 2024 cumulative update for Windows 11 has sparked complaints from users who suddenly lost all sound output and discovered that the built‑in File History backup feature stopped working after the patch was applied.

Reports began to surface within hours of the rollout, with affected owners describing a complete silence from system speakers, headphones, and Bluetooth devices, while the File History icon vanished from the Settings menu and scheduled backups failed to start.

The software giant confirmed the issue in a brief statement, saying engineers are actively investigating the root cause and will release a corrective update as soon as possible. No definitive timetable was given, leaving many to wait for an official fix.

Preliminary analysis points to a driver component introduced in the update that appears to clash with specific audio chipsets and the service that powers File History. The problem does not affect every Windows 11 installation, suggesting a compatibility mismatch rather than a universal flaw.

Until a patch arrives, Microsoft recommends that users either roll back the September update through the Settings > Recovery menu or employ a system restore point taken before the installation. Some individuals have reported temporary relief by reinstalling audio drivers, but the backup feature remains non‑functional, and no reliable third‑party workaround has emerged.

The timing of the glitch is noteworthy as Microsoft continues to push Windows 11 adoption across consumer and enterprise environments. Frequent or high‑impact update issues can influence buying decisions and IT rollout plans, especially for organizations that rely on File History for data protection. Historically, the company issues a new cumulative update roughly each month, so a remedial build is expected in the next cycle, though the exact release date is still uncertain.