Microsoft fixes Teams, Outlook launch failures on ARM Windows PCs

September 11, 2026 · BleepingComputer · Severity: LOW

Microsoft has fixed an issue where Teams and Outlook were failing to launch on Windows 11 systems after recent updates, particularly on ARM Windows PCs. The fix is included in the latest cumulative update, resolving application crashes and startup failures that affected enterprise productivity.

Key Takeaways

Microsoft has fixed an issue where Teams and Outlook were failing to launch on Windows 11 systems after recent updates, causing application crashes and startup failures that affected enterprise productivity.
The bug impacted ARM Windows PCs specifically, disrupting critical communication and collaboration tools used by organizations, and the fix is included in the latest cumulative update.
Enterprises relying on Teams and Outlook should ensure they apply the latest Windows cumulative update to resolve the launch failures and restore normal operation of these essential productivity applications.