@itlandytech: Running Windows-on-ARM hardware like the Surface Pro 11 or Surface Laptop 7? You might run into startup crashes with Microsoft Teams and the new Outlook for Windows. Microsoft has confirmed that the KB5121003 security update (released as part of the August 11, 2026 Patch Tuesday rollout) causes both applications to crash or completely fail to launch on ARM-based devices. Key Takeaways: * Affected Devices: Windows-on-ARM silicon devices, particularly newly deployed or freshly imaged PCs. * Root Cause: Impacted machines are missing recent Microsoft Store updates needed to maintain compatibility with the latest security patch. * Temporary Workaround: Ensuring all Microsoft Store apps are fully updated before or immediately after applying the KB5121003 update can help mitigate the launch failures. IT admins and enterprise teams deploying new ARM hardware should hold off or ensure image updates are completed to avoid productivity disruptions. #Microsoft #WindowsOnARM #ITSupport #PatchTuesday #MicrosoftTeams
