Microsoft Teams, Outlook fail to launch on ARM-based Windows PCs

BleepingComputer

September 3, 2026 at 8:55 AM

Overview

Microsoft is addressing a significant issue affecting users of Microsoft Teams and New Outlook on ARM-based Windows PCs. After the updates released since August 2026 Patch Tuesday, many users have reported that the applications are crashing or failing to launch altogether. This problem is particularly concerning for professionals who rely on these tools for communication and productivity. Microsoft has acknowledged the issue and is currently working on a fix, but until then, affected users may experience disruptions in their daily workflows. It's crucial for users to stay updated on the situation and apply any forthcoming patches as soon as they are available.

Key Takeaways

Affected Systems: Microsoft Teams, New Outlook, ARM-based Windows PCs
Action Required: Microsoft is working on a fix; users should stay tuned for updates and apply any patches released.
Timeline: Ongoing since August 2026

Original Article Summary

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. [...]

Impact

Microsoft Teams, New Outlook, ARM-based Windows PCs

Exploitation Status

No active exploitation has been reported at this time. However, organizations should still apply patches promptly as proof-of-concept code may exist.

Timeline

Ongoing since August 2026

Remediation

Microsoft is working on a fix; users should stay tuned for updates and apply any patches released.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

Related Topics: This incident relates to Windows, Microsoft, Patch.

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