Microsoft identified a "code issue" within its Intune device management software as the reason for the unintended rollout of Windows 11 to devices not designated for the upgrade. The flaw triggered upgrades despite existing policies meant to prevent them. Microsoft is working on a fix and has advised organizations to pause Windows updates via Intune to avoid further issues. Devices that received the upgrade erroneously will need manual intervention to revert to their previous version. This incident follows a similar occurrence in November 2024, where customers experienced unexpected upgrades from Windows Server 2022 to Windows Server 2025. Microsoft attributed that incident to third-party products used for managing server updates. Additionally, a month prior, Microsoft retracted a preview update for Windows 11 due to severe issues causing crashes.