Microsoft warns that upcoming updates for Windows 11 25H2 and 24H2, slated for release on 2025-10-14, could inadvertently trigger BitLocker recovery mode on some business PCs. This issue can arise during the installation of updates, potentially leading to data being inaccessible if the recovery key is unavailable. Typically, these recovery keys sync with a user's Microsoft account.
Details of the Update
The affected updates include Windows 11 25H2, Windows 11 24H2 (KB5066835), and certain Windows 10 builds (22H2). Microsoft has already begun distributing a fix for Windows 10, with business users advised to implement these remedies manually. The problem is mostly observed on Intel-based machines leveraging Modern Standby technology.
- Updates released on 2025-10-14 can cause BitLocker issues.
- Impacted OS versions are Windows 11 25H2, 24H2, and some Windows 10 builds.
- Recovery keys are essential to access data if issues arise.
- The problem is mainly with Intel-based PCs using Modern Standby.
Potential Causes and Additional Issues
Though Microsoft has not pinpointed a specific technical cause, some speculate the update might alter the boot chain or Secure Boot state, failing to suspend BitLocker during a critical reboot on affected Intel systems. Additionally, reports point to various issues, including Azure VMs and HP ProMini desktops trapped in BitLocker recovery loops and TPM/Intel TXT misconfigurations.
Clients must verify BitLocker's status by navigating to Settings > System > Storage > Disk & Volumes and checking if a volume is labeled 'Encrypted' under BitLocker settings. Disabling BitLocker before hardware changes requires new recovery keys, which must be backed up.
Along with BitLocker-related problems, the October 2025 update has also disrupted mouse and keyboard functionalities in Windows Recovery Environment (WinRE). Microsoft is issuing advisories and further fixes to counteract these challenges.
