The latest Windows 11 update, specifically the 'KB5063878' security update, has caused significant issues for solid-state drives (SSDs) with Phison controllers, rendering them non-functional after large data writes. Users have reported that after approximately 50GB of continuous writing, the operating system fails to recognize the SSD, making the drive's partition inaccessible upon reboot. Affected SSD models include Corsair Force MP600, Phison PS5012-E12, KIOXIA EXCERIA PLUS G4, Fikwot FN955, and SanDisk Extreme PRO M.2 NVMe 3D SSD. Preliminary analysis suggests that a storage driver or kernel-level regression introduced with the update may be mishandling long sequential writes, leading to controller lock-ups. Users are advised to avoid long sequential write operations, especially if their drives are among those listed or utilize Phison controllers.