Microsoft Teams, Outlook fail to launch on ARM-based Windows PCs
Microsoft has confirmed that recent Windows updates are causing launch failures for Teams and Outlook on ARM-based devices. The company has provided a temporary workaround involving an update to the Auto Super Resolution Package while a permanent fix is developed.
Why it matters
Software compatibility issues on newer hardware architectures like ARM highlight the challenges of maintaining stability across diverse computing platforms.
Microsoft is working to fix a known issue that causes crashes and launch failures for Microsoft Teams and New Outlook users after installing updates released since the August 2026 Patch Tuesday.
These issues affect only ARM-based Windows devices like the Surface Laptop 7 and Surface Pro 11 that run Windows 11 24H2 or later, and they mainly impact users who haven't installed Microsoft Store updates yet.
"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 said in a Windows release health update.
"Classic Outlook, Word, Excel, and other applications are not known to be affected. This issue is most likely to occur on new or freshly imaged PCs that have not yet installed any Microsoft Store updates."
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