Microsoft update disarms Outlook and Teams on Arm PCs
Installing an AI gaming package offers relief while custom cursors suffer a separate reset
Microsoft's August security update has caused issues with launching Outlook and Teams on Arm-based devices like Surface hardware. The problem was acknowledged on September 1 and included in the Windows release health dashboard. After installing updates from or after August 11, 2026 (KB5121003), Teams and the new Outlook for Windows may fail to launch or close unexpectedly on Arm-based devices such as Surface Pro 11 and Surface Laptop 7.
Classic Outlook, Word, Excel, and other applications are unaffected. The issue is most likely on new or freshly imaged PCs that have not installed any Microsoft Store updates. Microsoft recommends installing Auto Super Resolution Package version 1.0.19.0 or later from the Microsoft Store, as it may help the affected applications launch.
Additionally, a separate issue introduced by the August 27 preview update causes custom mouse pointers to revert to Windows defaults. This problem is limited to Windows 11 24H2, 25H2, and 26H1, with the Arm-related Outlook and Teams failure affecting Windows 11 26H1, which requires specific silicon like Qualcomm's Snapdragon X2.
Written by urgent.news from The Register's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
Also reported by 1 other outlet
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