Find notable cyber news and cases, enriched with sources, timelines, and signals.
Home Watchlists Beta Browse News Feed Stats About Contact

Microsoft Teams and new Outlook launch failures on ARM-based Windows devices

Service Disruption
First reported
Last updated
Happening score
H score 0
1 unique sources, 1 articles

Summary

Hide ▲

Microsoft is working to fix a Windows update issue that causes Microsoft Teams and new Outlook for Windows to fail to launch or close unexpectedly on ARM-based Windows 11 devices, disrupting access for affected users. The problem affects systems such as Surface Pro 11 and Surface Laptop 7 after August 11, 2026 updates, and Microsoft has issued a temporary workaround while a permanent fix is still pending.

Related Happenings

Classic Outlook for Windows Copilot button disappearance and Kaspersky-linked crash issue

Service Disruption
H score0 First: 16.09.2026 15:16 Last: 16.09.2026 15:16 Sources 1

About this happening: Microsoft is still investigating a Classic Outlook for Windows disruption that makes Copilot and Copilot Chat entry points disappear for some Windows users, with t...

Open Happening

Microsoft Windows 11 USB audio disruption after September 2026 updates

Service Disruption
H score0 First: 14.09.2026 11:08 Last: 14.09.2026 11:08 Sources 1

About this happening: Microsoft's KB5124008 and KB5124012 September 2026 security updates are breaking USB Audio Class 1.0 devices on Windows 11, version 24H2 or later, leaving some...

Open Happening

Microsoft Teams and Outlook for Windows launch failure on ARM-based Windows PCs

Service Disruption
H score0 First: 11.09.2026 12:39 Last: 11.09.2026 12:39 Sources 1

About this happening: Microsoft fixed a launch failure that caused Teams and the new Outlook for Windows to fail to open or close unexpectedly on ARM-based Windows devices after A...

Open Happening

Microsoft Windows Server 2025 memory-management crash disruption

Service Disruption
H score0 First: 08.09.2026 14:57 Last: 08.09.2026 14:57 Sources 1

About this happening: Microsoft’s Windows Server 2025 memory-management change is causing application crashes and SQL Server instability on affected systems. The problem hits software that...

Open Happening

Microsoft Teams desktop client on Windows launch delay disruption

Service Disruption
H score0 First: 04.09.2026 17:30 Last: 04.09.2026 17:30 Sources 1

About this happening: Microsoft Teams on Windows is experiencing a known launch disruption that can prevent some users from loading the desktop client or delay startup by up to two minutes. The issue i...

Open Happening

Timeline

  1. 03.09.2026 11:55 2 articles · 13d ago

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

    Victim Impact Update

    Microsoft is addressing a known issue where Microsoft Teams and new Outlook for Windows can fail to launch or close unexpectedly on ARM-based Windows 11 24H2 or later devices such as Surface Pro 11 and Surface Laptop 7 after installing Windows security updates released on or after August 11, 2026 (KB5121003). The problem is most likely on new or freshly imaged PCs that have not yet installed Microsoft Store updates, and Microsoft advises installing Auto Super Resolution Package version 1.0.19.0 or later as a temporary workaround while a permanent fix is prepared for a future Windows update.

    Show sources
    Open in new tab