Microsoft blames unexpected Windows driver updates on caching issue

Microsoft resolved an issue where a misconfiguration in the Windows Update caching service temporarily dropped device enrollment information, causing some Windows devices to be treated as non-enrolled and receive Microsoft-signed driver and BIOS updates despite admin policies preventing auto-updates. Administrators reported widespread unintended updates and resulting audio/video device failures; Microsoft updated the service cache, validated remediation with affected users, and is reviewing the caching behavior to improve detection and prevention of similar service issues.