Microsoft released its January cumulative for Windows 11 (KB5074109) on January 13, 2026 — and within days a series of serious regressions began surfacing, from brief black screens on some Nvidia-equipped machines to full startup failures that print UNMOUNTABLE_BOOT_VOLUME (Stop Code 0xED) and...
Microsoft has removed the legacy Agere soft‑modem driver (ltmdm64.sys) from supported Windows images after identifying an elevation‑of‑privilege vulnerability tracked as CVE‑2025‑24990, and that removal was shipped in the October 2025 cumulative updates; any fax or analog modem hardware that...