Microsoft’s latest optional preview for Windows 11, KB5034204, landed with promises to fix search, Bluetooth and ZIP handling — and promptly produced a fresh wave of user-reported breakages that range from stubborn install failures to a crippled shell (taskbar, File Explorer and desktop components). The patch, published as a preview build on January 23, 2024 for Windows 11 versions 22H2 and 23H2 (OS Builds 22621.3085 and 22631.3085), was intended to be a low-risk optional release but has...