outlook classic

Microsoft's first cumulative Windows 11 update of 2026 — delivered as KB5074109 on January 13 — has left a broad trail of disruption: critical security fixes were installed, but several high-impact regressions followed, forcing Microsoft into rapid damage control with out‑of‑band patches and...

Microsoft took the unusual step of telling users to uninstall the January 2026 Windows 11 security update (KB5074109) after the patch introduced regressions that left some machines unstable and, in a number of cases, critical productivity software unusable — most notably Classic Outlook for...

Microsoft pushed another out‑of‑band Windows 11 patch on January 24, 2026 — KB5078127 — to blunt a series of regressions that began with the January 13 cumulative (KB5074109), but the situation remains messy: the emergency fix restores many cloud‑file and Outlook Classic behaviors for most users...

Microsoft's unusual instruction to remove a Windows cumulative security update has placed administrators and everyday users in a difficult, high-stakes choice: accept the immediate return of core functionality or keep a patch that protects against security threats. Microsoft identified the...

Microsoft has done something it rarely does: told affected Windows 11 users to uninstall its January 13, 2026 security update (KB5074109) while engineers investigate widespread system and application breakages that followed the patch's rollout. The guidance comes after reports of severe...

A routine Patch Tuesday release on January 13, 2026 has left a significant portion of classic Outlook users scrambling: the Windows 11 cumulative update KB5074109 and a separate Outlook Current Channel build have each introduced regressions that render parts of the traditional Outlook experience...

Microsoft has warned that the January 13, 2026 cumulative security update for Windows — published as KB5074109 — can leave the classic (Win32) Outlook client unusable for many users, particularly those using POP profiles or storing .pst data files in cloud‑synced folders such as OneDrive; the...

The Jandndndndndnuary 13, 2026 Windows 11 cumulative update KB5074109 introduced a regression that can make the classic Outlook (Win32) client hang, fail to exit cleanly, and mis-handle POP/PST workflows — a problem that has prompted Microsoft to advise temporary workarounds, urged some users to...

Microsoft’s January cumulative update, KB5074109, has created a painful, real‑world problem for users of the classic (Win32) Outlook client — and Microsoft’s interim guidance is blunt: move PST files out of cloud‑synced folders (or use webmail) until a permanent fix arrives. The fallout includes...

Microsoft has confirmed a fresh wave of regressions tied to the January Patch Day security updates: some applications may stop responding or report errors when opening or saving files stored in cloud-synced locations such as OneDrive or Dropbox, Outlook Classic profiles that store PSTs on...

A routine January Patch Tuesday rollup (KB5074109) accidentally left parts of Microsoft’s classic Outlook experience unstable for a measurable number of users, triggering freezes, lingering OUTLOOK.EXE processes, lost Sent Items and a rapid sequence of follow‑up fixes and mitigations from...

Microsoft has confirmed that its January 2026 Patch Tuesday updates for Windows 11 introduced multiple regressions and has already shipped targeted fixes to address the most disruptive problems, but mixed reports and unacknowledged reports mean administrators and power users must act carefully...

Microsoft has published the January 13, 2026 cumulative security update for Windows 11 (KB5074109), and it’s available now via Windows Update and the Microsoft Update Catalog as a set of MSU packages that must be installed in a specific order for offline deployments and image servicing...