Microsoft Fixes Caching Bug That Caused Unauthorized Driver Updates on Managed Windows Devices

Дата публикации: 05-06-2026 12:50:31

Microsoft has fixed a Windows Update caching issue that caused driver updates to install on managed devices without notification, bypassing policies set to prev
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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 problem was acknowledged on June 2 and was confirmed to be resolved in a Wednesday update to the admin center incident report MO1332784.

The issue affected enterprise-managed Windows devices enrolled in Intune and similar management services.

What Caused the Windows Update Caching Bug and How It Hit Managed Devices

Microsoft explained that the problem was caused by a misconfiguration in the Windows Update caching service, which temporarily removed device enrollment information.

Without that data, affected devices were considered not enrolled, preventing the proper application of driver-approval controls. As a result, drivers ended up being installed on devices where administrators had set policies to prevent automatic driver updates.

Microsoft updated the service cache and restored the enrollment status for the affected devices to fix the issue. Windows administrators reported dealing with tens of thousands of devices that unexpectedly received BIOS and driver updates. In many cases, these unplanned updates caused audio or video devices to stop working.

Microsoft confirmed that the drivers installed were Microsoft-approved and signed and did not present a security risk.

However, unsanctioned updates to BIOS and drivers in managed enterprise environments can still lead to 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 Affected Organizations Should Do to Fix Driver and BIOS Problems

Organizations affected by the incident should check their devices for unexpected driver or BIOS updates installed between June 1 and June 4.

Devices experiencing audio or video problems afterward may need 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 choose Browse my computer, followed by Let me pick, and select a previous version from the list.

Microsoft has confirmed that the issue is resolved and that the enrollment status for affected devices has been corrected. Policies set to prevent automatic updates should now work as intended.

A Growing Pattern of Windows Update Problems in 2026

This incident is part of an ongoing pattern of 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 addressed where driver updates were installed on Windows 11 devices managed by Autopatch across the European Union, again bypassing administrative policies.

Microsoft explained that it is examining how the caching service dropped enrollment information in order to better detect, prevent, and respond to similar problems in the future.

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