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Industry observers note that the most recent issue affects Arm-based computers like the Surface Laptop 7 and Surface Pro 11. It’s been nearly a month since Microsoft dropped its Patch Tuesday patch for Windows 11—known as KB5121003—but problems are still cropping up and being reported by users.
According to the latest update, in fact, classic versions of Microsoft’s apps seem unaffected by the issue at hand:. According to a recent Windows health patch (spotted by BleepingComputer), Microsoft acknowledges that “Microsoft Teams and Outlook might fail to arrival on Arm-based devices.” That’s referring to the fresh Outlook app, not the classic Outlook app.
In a fresh development, classic Outlook, Word, Excel, and other applications are not known to be affected. This issue is most likely to occur on fresh or freshly imaged PCs that have not yet installed any Microsoft Store updates. After installing Windows security updates dropped on or after August 11, 2026, (KB5121003), Microsoft Teams and the fresh Outlook for Windows might fail to arrival or might close unexpectedly on Arm-based devices, such as Surface Pro 11 and Surface Laptop 7.
According to the latest update, microsoft says the issue affects Windows 11 versions 24H2, 25H2, and 26H1, and that the publisher is working on a fix that will be made available with a future Windows patch.
Industry observers note that for now, if you’ve installed the KB5121003 patch and you’re experiencing instability with Microsoft Teams and fresh Outlook, Microsoft’s provided workaround is to open the Microsoft Store, select Downloads → Check for updates, then install the most recent patch for the Auto Super Resolution Package (version 1.0.19.0 or later).
In a fresh development, in recent weeks, users have also reported that the patch breaks printers and PDFs on Windows 11 and crashing platform releases and causing other PC instability issues. This problem is just one more in a long line that traces back to the August Patch Tuesday patch.
As part of the ongoing story, this article originally appeared on our sister publication PC för Alla and was translated and localized from Swedish.
The report highlights that he has previously worked with Macworld, but today mainly writes for our sister sites PC för Alla and M3. Mikael has a firm grasp on which gadgets are dropped, and what is happening with the streaming services and the most recent AI tools. Mikael writes news across all our consumer tech categories.