Microsoft fixes Teams, Outlook launch failures on ARM Windows PCs
Microsoft fixed in KB5124012 a bug stopping Teams and new Outlook from launching on ARM Windows 11 PCs.
Microsoft confirmed Teams and the new Outlook could fail to launch or crash on ARM-based Windows 11 24H2+ devices such as Surface Pro 11 after installing updates from August 11, 2026 (KB5121003), mainly on machines without Microsoft Store updates. The September 8, 2026 Patch Tuesday cumulative update KB5124012 resolved the issue. Updating the Auto Super Resolution Package had served as a temporary workaround.
- Issue affects ARM devices like Surface Pro 11 and Surface Laptop 7
- Rooted in updates released on or after August 11, 2026 (KB5121003)
- Fix shipped in September 2026 cumulative update KB5124012
- Part of a series of August 2026 update known issues including WPF printing
From the original article
2 min read at bleepingcomputer.com
Microsoft has fixed a bug that prevented Teams and Outlook from launching on ARM-based Windows devices after installing updates released since the August 2026 Patch Tuesday. [...]
By Sergiu Gatlan · bleepingcomputer.com
A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.