> ## 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 startup problem: how to fix it - URL: https://todayfixtech.com/microsoft-to-do-startup-problem/ - Published: 2026-11-01T04:45:54.000Z - Updated: 2026-11-01T04:45:54.000Z - Author: Md Sojib Mia - Tags: Microsoft, Troubleshooting If [Microsoft To Do hangs](https://todayfixtech.com/fix-microsoft-365-login-issues/) on the splash screen, keeps loading, or closes as soon as you open it, the usual cause is a local app problem, a sign-in or sync issue, or a device setting such as wrong date and time. Start with the safest checks first: confirm your Microsoft account is signed in, check your internet connection, make sure the date and time are correct, and look for a service issue before you repair or reinstall anything. ## Common startup symptoms When Microsoft To Do has a startup problem, the exact message varies. The symptom usually shows up like this: ```text - The splash screen freezes - The app keeps loading but never opens - The app closes immediately after launch - The app opens, but lists do not appear right away ``` Symptom This can happen right after an app update, after a device restart, after a password change, or when the app is trying to sync and cannot finish. If the same account works on one device but not another, the problem is usually on the failing device. If several devices fail at the same time, the app may be fine and the issue may be on Microsoft’s side. ## Before you start This applies to Microsoft To Do on Windows, Android, and iPhone. Most of the first checks do not need administrator rights, root access, or any special privilege. On Windows, later repair steps may need you to sign in with an account that can change app settings. On Android and iPhone, you may need the device passcode or your Microsoft account password. You do not need to back up anything for the first checks, and they are low risk. Before you try repairs, do these two safe checks: - Make sure you can sign in to the same Microsoft account elsewhere. - Check that the device has internet access and the date and time are set correctly. ## When the problem is probably Microsoft’s side If Microsoft To Do fails on several devices, or it opens but keeps losing sync across all of them, the problem may be on Microsoft’s side rather than yours. A service issue usually looks like this: - The same account fails on Windows, Android, and iPhone. - You can sign in elsewhere, but To Do will not load lists correctly. - The problem starts suddenly and affects more than one device at the same time. In that case, stop cycling through reset or reinstall steps on every device. Keep one device ready, check again later, and avoid repeated changes until the service is behaving normally. If only one device is affected, focus on that device’s app cache, OS update, and sign-in state. That is much more likely to fix the problem than a wider account change. ## Fix Microsoft To Do on Windows Use this on Windows if the app freezes, will not open, or closes right away. You do not need administrator rights for the first two steps. 1. Close Microsoft To Do completely and open it again. ```text Settings > Apps > Installed apps > Microsoft To Do > Advanced options ``` Settings path Open the app once more after closing it. If it starts normally, the problem was likely a temporary app hang. 1. Check the app’s repair options in Windows settings. ```text Settings > Apps > Installed apps > Microsoft To Do > Advanced options > Repair ``` Settings path Run **Repair** first. If the app opens after this, the install was probably damaged in a way Windows could fix without removing data. 1. Confirm that you are signed into the right Microsoft account in the app and in Windows. ```text Settings > Accounts > Email & accounts ``` Settings path If the app opens but your tasks are missing, a wrong account is a common reason. Sign out only if you are sure you can sign back in with the same account. 1. Check Windows date and time if the app still hangs or keeps failing to sync. ```text Settings > Time & language > Date & time ``` Settings path If the time was wrong, fix it and reopen To Do. If the app still does not start, the issue is more likely the app install or a broader Windows problem. 1. Use **Reset** only if Repair did not help. ```text Settings > Apps > Installed apps > Microsoft To Do > Advanced options > Reset ``` Settings path Reset can remove local app data on that device. Use it only after the safer checks and repair step have failed. If the app starts after Reset but your lists still look wrong, treat it as a sync problem and check your account and network again before doing anything more drastic. ## Fix Microsoft To Do on Android Use this on Android if To Do freezes on launch, loops on loading, or closes immediately. You do not need root access, and the first steps are safe. 1. Force stop the app, then open it again. ```text Settings > Apps > To Do > Force stop ``` Settings path If the app opens normally after that, the issue was probably a temporary crash. 1. Check that Android can reach the internet and that background data is not blocked for the app. ```text Settings > Apps > To Do > Mobile data & Wi‑Fi ``` Settings path If To Do opens only on Wi-Fi or only on mobile data, the connection settings are part of the problem. 1. Confirm the Microsoft account in the app. ```text To Do > Profile or account area ``` Settings path If the app opens but lists are missing, the wrong account is often the reason. Sign in with the account that should own the tasks. 1. Clear the app cache if the startup problem continues. ```text Settings > Apps > To Do > Storage & cache > Clear cache ``` Settings path If To Do opens after clearing cache, the cached files were likely corrupted. If it still fails, the app install or device state is the more likely cause. 1. Check the system date and time if the app still will not load correctly. ```text Settings > System > Date & time ``` Settings path If the date or time was wrong, fix it and try To Do again. If nothing changes, move to the device update or reinstall path only after the safer steps above. ## Fix Microsoft To Do on iPhone Use this on iPhone if To Do hangs on the splash screen, crashes on open, or never finishes starting. The first checks do not risk your tasks. 1. Close the app from the app switcher and open it again. ```text Swipe up and pause > Microsoft To Do > swipe it away ``` Settings path If it opens cleanly after that, the problem was probably a temporary app freeze. 1. Check your network and make sure To Do is allowed to use it. ```text Settings > Cellular > Microsoft To Do ``` Settings path If the app opens on Wi-Fi but not on cellular, or the other way around, the network setting is part of the problem. 1. Confirm the Microsoft account inside the app. ```text To Do > Account area ``` Settings path If the app opens but your tasks are missing, check whether you are signed in to the correct Microsoft account before you remove the app. 1. Check the iPhone date and time. ```text Settings > General > Date & Time ``` Settings path If the time is wrong, fix it and reopen To Do. Bad time settings can break sign-in and sync. 1. Reinstall the app only if the safer checks do not help. Reinstalling can remove local app data on that device. Do this only after you have checked the account, network, and date and time. If the app opens after reinstall but the lists are still missing, the issue is more likely sync than startup. ## Verify it worked Open Microsoft To Do and watch for three things: the app should move past the splash screen, it should stay open, and your lists should load without repeated errors. If the app opens but the wrong tasks appear, wait a little while while it stays connected to the internet. ```text - Microsoft To Do opens normally - Your lists appear - New changes sync after a short wait ``` Expected output If the app opens but tasks still do not appear, sign out and back in only if you are sure you are using the right Microsoft account. If that still does not help, compare the same account in another device or browser session to see whether the problem is local or on the sync side. ## Conclusion If Microsoft To Do still will not open after the safe checks, use the fix for your device and work through it once. If the app opens but your tasks are missing, treat it as a sync problem and check the account and connection first. ## Frequently Asked Questions ### Will reinstalling Microsoft To Do delete my tasks? It can remove local data on that device, but tasks tied to your Microsoft account should return after sign-in and sync if they were already uploaded. That is why it is safer to try repair, restart, and account checks first. ### Why does Microsoft To Do open on one device but not another? That usually means the problem is local to the failing device, such as cache, app version, or OS issues. If multiple devices fail at the same time, the account or Microsoft service side becomes more likely. ### What if Microsoft To Do opens but my lists are missing? Check that you are signed into the correct Microsoft account, then keep the app online long enough to resync. If the lists still do not appear, compare the account in another device or browser session to see whether the data is missing everywhere or only on one device.