Microsoft has fixed a Windows Update caching issue that caused driver updates to install on managed devices without notification, bypassing policies set to prevent automatic updates.
The issue was acknowledged on June 2 and confirmed as resolved in Wednesday’s update to Admin Center incident report MO1332784.
The issue affected enterprise-managed Windows devices enrolled in Intune and similar management services.
What Causes the Windows Update Caching Bug and How It Affects Managed Devices
Microsoft reported that the problem was caused by a misconfiguration in the Windows Update caching service, which temporarily deleted device enrollment information.
Without that data, affected devices were considered unenrolled, preventing proper application of driver-approval controls. As a result, drivers began to be installed on devices where administrators had set policies to prevent automatic driver updates.
Microsoft updated the service cache to fix the issue and restored enrollment status for affected devices. Windows administrators reported dealing with thousands of devices that unexpectedly received BIOS and driver updates. In many cases, these unplanned updates cause audio or video devices to stop working.
Microsoft confirmed that the installed drivers were approved and signed by Microsoft and did not pose any security threat.
However, unapproved updates to BIOS and drivers in managed enterprise environments can still cause stability, compatibility, and support issues, even if the drivers themselves are not malicious.
Microsoft has not disclosed how many organizations or regions were affected.
What should affected organizations do to fix driver and BIOS issues
Organizations affected by the incident should check their devices for unexpected driver or BIOS updates installed between June 1 and June 4.
Devices that subsequently experience audio or video problems may require a driver rollback to restore normal functioning. To do this, IT administrators can open Device Manager, right-click the affected device, select Update Driver, then select Browse My Computer, followed by Let me choose, and select a previous version from the list.
Microsoft has confirmed that the issue has been resolved and the enrollment status for affected devices has been fixed. Policies set to prevent automatic updates should now work as intended.
Increasing pattern of Windows Update problems in 2026
This incident is part of a pattern of ongoing problems with Windows Update management. In April, Microsoft fixed a bug that caused systems running Windows Server 2019 and 2022 to upgrade to Windows Server 2025 without any administrator action.
Last month, another issue was resolved where driver updates were installed on Windows 11 devices managed by Autopatch across the EU, again bypassing administrative policies.
Microsoft reported that it is investigating how the caching service dropped enrollment information to better detect, prevent, and respond to similar problems in the future.
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