Microsoft Teams and New Outlook Launch Failures on ARM-based Windows PCs After Recent Updates
Users report crashes and startup failures following August 2026 Patch Tuesday updates; Microsoft acknowledges issue and is developing a fix.

Key Takeaways
- Microsoft Teams and New Outlook crash or fail to launch on ARM-based Windows PCs after recent cumulative updates.
- The issue emerged following the August 2026 Patch Tuesday updates.
- Microsoft acknowledges the problem and is developing a fix, but no patch date or KB identifier has been released.
- The issue is categorized as a compatibility/launch failure, not an active security exploit or CVE.
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Microsoft Reports Desktop Loading Issues Following August 2026 Windows Updates
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