Overview

• Microsoft's March and April 2025 updates for Windows 11 24H2 triggered widespread SECURE_KERNEL_ERROR blue screen crashes with error code 0x18B.
• The Known Issue Rollback (KIR) feature is being used to automatically reverse the faulty updates on non-managed devices within 24 hours; restarts may expedite the fix.
• Enterprise IT administrators must manually deploy a Group Policy update (KB5053656_250412_03103) to resolve the issue on managed systems, followed by device restarts.
• Microsoft has confirmed that the KIR is a temporary measure while it works on a permanent update to fully address the secure kernel error.
• This incident highlights ongoing challenges with Windows updates, following prior issues such as boot loops, BitLocker prompts, and device connectivity problems.