Table of Contents
Introduction
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.
These issues affect ARM-based Windows devices like the Surface Laptop 7 and Surface Pro 11 running Windows 11 24H2 or later, and they mainly impact users who haven't installed Microsoft Store updates yet.
"After installing Windows security updates released on or after August 11, 2026, (KB5121003), Microsoft Teams and the new Outlook for Windows might fail to launch or might close unexpectedly on ARM-based devices." — Microsoft
What Is Happening?
Users of ARM-based Windows PCs are reporting that Microsoft Teams and the new Outlook for Windows either fail to launch or close unexpectedly after installing the August 2026 security updates.
Key symptoms:
- Microsoft Teams fails to launch or crashes immediately after opening
- New Outlook for Windows fails to launch or closes unexpectedly
- Applications may close without any error message
- The issue occurs after installing KB5121003 (August 2026 Patch Tuesday update)
- Most commonly affects new or freshly imaged PCs that haven't installed Microsoft Store updates
Microsoft has not yet disclosed the root cause of the issue, but a temporary workaround is available.
Affected Devices and Systems
Affected Devices:
- Surface Laptop 7 — ARM-based
- Surface Pro 11 — ARM-based
- Other ARM-based Windows devices running Windows 11 24H2 or later
Affected Applications:
- Microsoft Teams — new and classic versions
- New Outlook for Windows — the modern Outlook experience
Affected Updates:
- KB5121003 — Windows security update released on August 11, 2026
- All Windows updates released on or after August 11, 2026
"This issue is most likely to occur on new or freshly imaged PCs that have not yet installed any Microsoft Store updates." — Microsoft
What Is NOT Affected
Microsoft has confirmed that the following applications are not known to be affected by this issue:
- Classic Outlook — the traditional Outlook desktop application
- Word — Microsoft Word for Windows
- Excel — Microsoft Excel for Windows
- PowerPoint — Microsoft PowerPoint for Windows
- Other applications — most other Microsoft 365 applications
Classic Outlook, Word, Excel, and other applications are not known to be affected by this issue.
Temporary Workaround — How to Fix It
Microsoft has provided a temporary workaround for affected users. The fix involves updating the Auto Super Resolution Package through the Microsoft Store.
Steps to fix Teams and Outlook launch failures on ARM-based Windows PCs:
- Open the Microsoft Store — click the Store icon on your taskbar or search for "Microsoft Store" in the Start menu
- Go to Downloads — click the "Downloads" button in the bottom-left corner of the Store window
- Check for updates — click the "Check for updates" button
- Install the Auto Super Resolution Package — look for Auto Super Resolution Package version 1.0.19.0 or later and install it
- Restart your device — after the installation completes, restart your computer
What is the Auto Super Resolution Package?
According to Microsoft, this package enables Copilot+ PCs to use AI to make supported games play more smoothly with enhanced details. While it's primarily a gaming feature, it appears to resolve the Teams and Outlook launch issues on ARM devices.
After installing the Auto Super Resolution Package update, Microsoft Teams and New Outlook should launch and function normally.
Permanent Fix — Coming Soon
Microsoft has confirmed that it is working on a permanent fix for this issue, which will be released with a future Windows update.
What we know:
- A permanent fix is being developed
- It will be released through a future Windows update
- No specific timeline has been provided
- The temporary workaround should be used in the meantime
Microsoft says that it's now working on a permanent fix for this issue, which will be released with a future Windows update.
August 2026 Update Issues — A Growing Pattern
This is the latest in a series of known issues caused by Windows updates released in August 2026. The month has been particularly problematic for Windows users.
August 2026 — .NET Framework Printing Issues
- Microsoft confirmed that August 2026 .NET Framework updates are breaking printing and PDF export in some applications
August 2026 — RGB Lighting Device Crashes
- Microsoft confirmed that peripherals with built-in RGB lighting were triggering system crashes and gaming issues with "EXCEPTION_ACCESS_VIOLATION" errors
- A fix was later rolled out for this issue
August 2026 — Defender Antivirus False Alerts
- Microsoft asked customers to ignore alerts that Microsoft Defender Antivirus had been turned off after installing the latest Defender updates
September 2026 — ARM Teams/Outlook Launch Failures
- The current issue affecting ARM-based Windows devices
The pattern of issues following August 2026 updates suggests significant quality assurance challenges at Microsoft.
Final Thoughts
The launch failures affecting Microsoft Teams and New Outlook on ARM-based Windows PCs are a frustrating but fixable issue. While Microsoft works on a permanent solution, the temporary workaround — updating the Auto Super Resolution Package through the Microsoft Store — should restore functionality for most users.
Key takeaways for users:
- Issue — Teams and New Outlook fail to launch on ARM-based Windows PCs after August 2026 updates
- Affected devices — Surface Laptop 7, Surface Pro 11, and other ARM-based Windows 11 24H2+ PCs
- Fix — Update the Auto Super Resolution Package to version 1.0.19.0 or later via Microsoft Store
- Permanent fix — Microsoft is working on a solution for a future Windows update
- Pattern of issues — August 2026 updates have caused multiple problems across Windows platforms
If you're a business or organization using ARM-based Windows devices and need assistance with IT management or troubleshooting, contact SystemLogicIT for expert support.