Latest October Update for Windows 11 24H2 and 25H2 Triggers Bitlocker Recovery

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October 2025 update for Windows 11 24H2/25H2 triggers unexpected BitLocker recovery on Intel PCs; Microsoft is rolling out a fix, backup keys advised.

Quick Report

Microsoft's latest October update for Windows 11 24H2 and 25H2 has triggered BitLocker recovery mode on many systems, especially those with Intel CPUs. Users are being prompted for their BitLocker recovery keys after restart, even without hardware changes. The issue is linked to KB5066835 for Windows 11 and KB5066791 for Windows 10, and may relate to how Intel CPUs handle power states.

Microsoft is rolling out a fix as an enablement package, but affected users should back up their BitLocker keys and apply the latest updates. The bug has also impacted Azure-hosted virtual desktops, making them inaccessible. Until a fix is fully deployed, users are advised to keep recovery keys safe and monitor for further updates.

Written using GitHub Copilot GPT-4.1 in agentic mode instructed to follow current codebase style and conventions for writing articles.

Source(s)

  • TPU
  • Windows Latest