> ## Content Index > Fetch the complete content index at: https://todayfixtech.com/llms.txt > Use this file to discover other available public pages before exploring further. # Microsoft To Do Keeps Restarting: How to Stop the Crashes - URL: https://todayfixtech.com/microsoft-to-do-keeps-restarting/ - Published: 2026-11-01T04:58:25.000Z - Updated: 2026-11-01T04:58:25.000Z - Author: Md Sojib Mia - Tags: Microsoft, Troubleshooting If Microsoft To Do keeps restarting or disappearing as soon as you open it, the usual cause is a bad cache, a faulty app update, a sync problem, or a device-specific app glitch. Start with the safest fixes first: close the app fully, restart the device, [and check for updates](https://todayfixtech.com/microsoft-365-updates-features/). Your synced tasks are normally stored in your Microsoft account, so these first steps are meant to avoid data loss. ## What’s actually happening when Microsoft To Do keeps restarting ```text The app may flash open and close, loop back to the splash screen, restart right after you tap it, or quit as soon as you sign in. ``` Symptom This usually shows up right when you launch Microsoft To Do, after you sign in, when a list loads, or right after a sync spinner appears. If you can get into the app for a moment, pay attention to when it restarts: - immediately on launch - after you sign in - when a list loads - after a sync spinner or refresh That timing helps narrow it down. A restart before sign-in usually points to the app or device itself. A restart that starts after your account loads is more often tied to sync data or the app’s local cache. ## Before you start This applies to Microsoft To Do on Windows, iPhone, Android, and the web app as a quick check. You do not need administrator rights for the basic checks. Repair on Windows may need access to app settings from a normal signed-in user account; some system-level fixes can require admin rights. None of the first steps should delete your synced tasks. If you rely on anything that has not synced yet, make sure it is already in your Microsoft account before you reset or reinstall anything. Two safe checks to do first: - open Microsoft To Do on another device, or in the web app, and see whether it stays open - close the app fully before you try again, so you are not troubleshooting a stale background process ## Try the safest fixes first Start with the least risky steps. These usually clear the kind of temporary problem that makes the app relaunch itself. 1. Close Microsoft To Do completely. On Windows, use Task Manager and end the app if it is still running in the background. On iPhone or Android, swipe the app away from the app switcher. If the app was stuck in a loop, this should stop the restart cycle. If it opens again and still restarts, move on. 1. Restart the device. A full restart clears temporary memory problems and can fix a bad launch state after sleep, a system update, or a stuck sync session. After the restart, open Microsoft To Do once and wait a moment. If it stays open, the issue was temporary. If not, keep going. 1. Check for updates. Update Microsoft To Do from the Microsoft Store, App Store, or Google Play, depending on the device. Also check for pending OS updates on Windows, iPhone, or Android. A bad app update or a mismatch between the app and the operating system can cause repeated restarts. If an update installs and the app opens normally afterward, you’re done. 1. Sign out and sign back in if the app stays open long enough. This can fix an account token problem or a sync loop. If you can get into the app, sign out, close it, open it again, and sign back in. If it restarts before you can sign out, skip this step for now and go to the repair section. If sign-in finishes and the app stays open, the account session was likely the problem. ## If it still restarts, repair or reset the app If the simple fixes do not help, the next step depends on the device. On Windows, use the built-in repair option first. On mobile, clearing app data or reinstalling usually replaces a broken local cache without removing your synced tasks. ### Windows: repair Microsoft To Do Open Settings and go to the app list, then use the app’s repair option. ```text Settings > Apps > Installed apps > Microsoft To Do > Advanced options > Repair ``` Settings path Repair tries to fix the app files without wiping local app data. Open To Do again after the repair. If the app stays open, the files were probably damaged and repair fixed them. If it still restarts, continue to the reset step only if repair does not help. ### Windows: reset Microsoft To Do Reset can remove local app data stored on that PC. Synced tasks should come back after you sign in again, but anything not yet synced may be lost. ```text Settings > Apps > Installed apps > Microsoft To Do > Advanced options > Reset ``` Settings path After reset, launch the app and sign in again. If the restart loop is gone, the local app data was the problem. If it still happens, reinstall the app from the Microsoft Store. ### iPhone and Android: clear app data or reinstall On mobile, the usual order is to clear cache first if the device offers it, then clear storage or reinstall if the app still crashes before you can use it. - iPhone: remove the app, then install it again from the App Store. - Android: use App info to clear cache first if available; if that does not help, clear storage or reinstall from Google Play. After reinstalling, sign back in and check whether your lists load normally. If the app crashes as soon as you sign in, the account or synced data may be triggering the problem. ### Check your sign-in status If the app launches but restarts right after account sync starts, confirm that you are using the right Microsoft account and that you are not signed in to multiple accounts in confusing ways. Sign out of any extra Microsoft accounts on the device, then sign in to the one that owns the To Do lists. If the web app works but the mobile app does not, the account is probably fine and the local app install is the issue. If every device restarts after the same account signs in, the sync data or account state deserves a closer look. ## How to check that it’s really fixed Test the app the same way it was failing before. Open Microsoft To Do, wait for the home view to load, then open a few lists and move between them. If the app used to restart during sign-in, sign out and back in once more to confirm the sign-in path is stable too. A good sign is simple: - the app opens and stays open - lists load without flashing shut - you can switch between lists without a restart - completed tasks sync and stay marked complete after a refresh If you want one more check, open the same account on another device or in the web app and compare the lists. If everything matches and the app stays open for a few minutes, the restart loop is likely gone. If the app restarts again after a successful launch, the problem is not fully fixed yet. Go back to the last step that changed something, or move to Microsoft support if the same behavior keeps coming back. ## How to keep it from coming back The best prevention is simple: keep Microsoft To Do and your device OS updated, and avoid interrupting sync during troubleshooting. If you are moving between devices, give one device time to finish syncing before you sign in on another one. A few habits help reduce repeat crashes: - update the app after a bug fix release - keep Windows, iPhone, or Android current - avoid repeated sign-in and sign-out cycles unless you need them for troubleshooting - if the app starts acting odd after a device update, check for a newer To Do update right away If the restart loop comes back after a specific update, note which device changed last. That often tells you where the problem started. If the app is still unstable after repair, reset, reinstall, and a clean sign-in, contact Microsoft support with the device, OS version, and the exact point where the restart begins. ## Conclusion If Microsoft To Do still restarts after repair or reinstall, focus on whether the problem follows one device or one account. Try the web app next, then contact Microsoft support if the same restart pattern shows up there too. ## Frequently Asked Questions ### Will I lose my tasks if I reinstall Microsoft To Do? Usually not, as long as the tasks have already synced to your Microsoft account. If you have anything that has not synced yet, handle that first before you remove the app. ### Why does Microsoft To Do restart only on one device? That usually points to a local app cache, a bad install, or a device update problem. If the web app and other devices work, the account is probably not the main issue. ### What if Microsoft To Do restarts right after I sign in? That often means the crash is happening during sync or account loading. Check that you are using the correct account, sign out of extra Microsoft accounts on the device, then repair or reinstall the app on the affected device.