Why Teams and Outlook Suddenly Won't Open on Your ARM PC

Emily Davis · 2026-09-03

You're sitting down to answer a few messages, click the Teams icon, and… nothing. Or Outlook opens for a split second before crashing back to the desktop. It's frustrating, especially when you've got work to do. If you're running an ARM-based Windows PC and you've installed updates since August 2026's Patch Tuesday, you're not alone. Microsoft has acknowledged the problem and is working on a fix, but that doesn't help you right now, does it? Let's break down what's happening, why it's affecting ARM devices specifically, and what you can do to get back to work while we wait for Microsoft to roll out a permanent solution. ### What's Causing the Crashes? The root of the issue lies in a recent batch of Windows updates that shipped with the August 2026 Patch Tuesday release. For reasons Microsoft hasn't fully detailed yet, these updates are interfering with how Teams and the New Outlook run on ARM-based processors like the Snapdragon X series. The apps either fail to launch altogether or crash shortly after opening, making them unusable for thousands of users. It's a classic case of a compatibility hiccup that slipped through testing. The updates themselves aren't malicious, and your data is safe. The problem is purely technical, but that doesn't make it any less annoying when you're staring at an error message. ### Who's Affected? If you're using a Windows laptop or tablet powered by an ARM chip—like the Surface Pro 11 or any of the newer Copilot+ PCs—you're in the risk zone. Both Microsoft Teams (both the classic and new versions) and the New Outlook are impacted. If you're on a traditional x86 Intel or AMD machine, you can breathe easy. This one's specific to ARM architecture. ### What Can You Do Right Now? While Microsoft works on a patch, here are a few workarounds that might get you back up and running: - **Roll back the recent update**: Go to Settings > Windows Update > Update history, and uninstall the latest quality update. This often restores functionality immediately. - **Use the web versions**: Both Teams and Outlook have fully functional web apps that run in your browser. It's not the same as the desktop experience, but it'll keep you connected. - **Try the classic Outlook**: If you're using the New Outlook, switch back to the classic version temporarily. It's not affected by this bug. - **Check for beta updates**: Occasionally, Microsoft pushes a fix through the Insider channel before the general release. If you're comfortable with that, you might get relief sooner. ### Why This Matters for Privacy-Conscious Users Here's a side note that's worth considering, especially if you value your digital privacy. When desktop apps fail, the natural instinct is to jump to web versions. And while that works, it also means your traffic is flowing through your browser, where tracking scripts and extensions can see more than you'd like. If you're managing multiple accounts for work or personal projects, this is where an antidetect browser becomes a practical tool, not just a niche product. Using a dedicated browser profile for each account keeps your sessions isolated, so a crash in one app doesn't expose your other activities. It's a small shift in how you work, but it can make a big difference in how much control you have over your online footprint. ### What's Next From Microsoft? Microsoft has said they're actively investigating the issue and will release a fix in an upcoming update. No specific timeline has been given, but historically, these kinds of patch-related bugs get resolved within a week or two. In the meantime, the workarounds above should keep you productive. ### The Bottom Line Software bugs are inevitable, but they don't have to derail your entire day. If Teams and Outlook are refusing to launch on your ARM PC, roll back the update or switch to the web versions until Microsoft sorts things out. And if you're juggling multiple accounts while you're at it, consider how a solid antidetect browser could give you an extra layer of separation and security. Stay patient, stay productive, and keep an eye on Windows Update for that fix. It's coming.