Microsoft is addressing issues stemming from the KB5055523 update for Windows 11, which has caused Blue Screen of Death (BSoD) errors with the 0x18B error code. This update was automatically installed on most devices and is linked to the earlier KB5053656 preview update. Microsoft is implementing a Known Issue Rollback (KIR) to mitigate the problem, although it may take up to 24 hours for the fix to propagate to consumer and non-managed business devices. For enterprise-managed devices, IT administrators must manually resolve the issue by configuring the necessary Group Policy.