Microsoft issues optional patches to fix File History and Always On VPN bugs from September 2026 updates
Microsoft has released optional updates to address critical bugs introduced by the September 2026 Windows security patches, specifically targeting failures in the File History backup feature and Always On VPN connections. While the mandatory September 8 update (KB5124008) caused widespread issues, including broken backups and failed remote access, Microsoft has since provided workarounds and partial fixes. The File History bug, which prevented backups and displayed false error messages, is addressed by optional updates KB5124010 and KB5124006, though some functionality remains impaired. Meanwhile, Always On VPN issues, where connections stall or fail due to protocol conflicts, require administrators to manually switch from automatic protocol selection to a single protocol (SSTP or IKEv2). These issues are part of a broader pattern of problems caused by the September updates, including Remote Desktop failures and audio glitches, which Microsoft is continuing to resolve through out-of-band and optional releases.
