🔴 Microsoft fixes Teams, Outlook launch failures on ARM Windows PCs

Microsoft has fixed a bug that prevented Teams and Outlook from launching after installing updates released since the August 2026 Patch Tuesday.

The company confirmed last week that this known issue affects users who haven't installed Microsoft Store updates on ARM-based Windows devices (such as the Surface Pro 11 and Surface Laptop 7) running Windows 11 24H2 or later.

"After installing Windows security updates released on or after August 11, 2026, (KB5121003), Microsoft Teams and the new Outlook for Windows might fail to launch or might close unexpectedly on ARM-based devices, such as Surface Pro 11 and Surface Laptop 7," Microsoft explained in a Windows release health update.