How to Fix Microsoft OneNote Crashing on Startup

Q: Will resetting Microsoft OneNote delete my notebooks or notes?

A: No. Resetting Microsoft OneNote clears the app’s local data and startup state, not the notebooks stored in OneDrive or on your device. Your notes stay tied to your account and sync source. If you keep a local notebook file outside OneDrive, back it up first before any uninstall or reinstall.

Q: What should I do if OneNote still crashes after Repair and Reset?

A: Move to a deeper isolation check: start OneNote in safe mode, then remove any Office add-ins or third-party tools that hook into Office. If the crash continues, the problem is in the Office runtime, your account token, or the notebook sync state rather than the basic app cache. Microsoft OneNote Sync Errors is the next article to use.

Q: Can I fix this by reinstalling Microsoft OneNote without touching Office?

A: Yes. If you installed OneNote from the Microsoft Store, you can uninstall and reinstall just that app. If OneNote came through Microsoft 365, reinstalling OneNote alone is not the cleanest fix because it shares components with the Office suite. In that case, update Office first and then reinstall from the Office installer if needed.

Q: How do I undo the cache deletion if OneNote starts acting differently afterward?

A: You do not restore the deleted cache files. OneNote rebuilds fresh cache data the next time it launches, and that new cache becomes the active state. If something looks off after the cleanup, sign out and sign back in, then reopen your notebooks so OneNote can repopulate its local files correctly.

Q: Does a startup crash on one PC mean my notebook is broken everywhere?

A: No. A startup crash on one PC points to that device’s app state, cache, add-ins, or Office install. If the same notebook opens normally on another device or in OneNote on the web, the notebook itself is intact. If it fails everywhere, the notebook sync state needs attention, not just the local app.

Microsoft OneNote crashing on startup means the app opens, flashes for a second, and closes before you can do anything. In some cases it fails before your notebooks load; in others it shows the splash screen and then disappears. This guide walks you through the most reliable fixes for Microsoft OneNote so you can get it opening normally again.

Quick fix

The fastest fix is to reset OneNote from Windows settings and then launch it again after a full reboot. If that does not work, clear the app’s cache by repairing or resetting Microsoft OneNote from Settings > Apps > Installed apps > Microsoft OneNote > Advanced options. For most startup crashes, the problem is a corrupted local file or a bad add-in state, and a reset clears it.

Why this happens

OneNote crashes on startup when its local profile data, cache, or synced notebook state is damaged. A failed update, a broken sign-in token, or a notebook that is stuck syncing can also stop the app from finishing launch. If another Office component is corrupted, OneNote inherits the problem because it shares parts of the Office runtime and account sign-in system.

How to fix it

Restart Windows and try OneNote again.
Close every Office app, then restart your PC from the Start menu. After Windows comes back, open OneNote directly from the Start menu instead of from a pinned shortcut or a recent file. If OneNote opens cleanly after a reboot, the crash was caused by a temporary lock or a hung background process.
Repair OneNote from Windows settings.
Open Settings > Apps > Installed apps, scroll to Microsoft OneNote, click the three dots, and choose Advanced options. First click Repair and wait for Windows to finish; this keeps your app data intact and replaces damaged program files. If OneNote still crashes, return to the same screen and use Reset to clear the local app data and rebuild OneNote’s startup state.
Sign out of OneNote and Office, then sign back in.
Open OneNote only if it stays open long enough to show the account area, then choose File > Account and sign out of your work, school, or personal account. Also open any Office app such as Word, go to File > Account, and sign out there too. Restart Windows, then sign in again inside OneNote; this refreshes the token OneNote uses to load notebooks and licenses.
Disable third-party add-ins and launch from a clean Office state.
Press Windows + R, type onenote /safe, and press Enter to start OneNote without extra components. If OneNote opens in safe mode, the crash points to an add-in or extension that loads during normal startup. Remove recently added Office add-ins from the Office add-in store or uninstall any note-taking, clipping, or sync tools that hook into Office, then launch OneNote normally and confirm it stays open.
Clear the local OneNote cache.
Close OneNote completely, then open File Explorer and go to %localappdata%\Microsoft\OneNote\. Delete the contents of the cache folders inside that location, not the notebook files themselves. Start OneNote again after the deletion; if the cache was corrupt, the app rebuilds it on launch and the crash stops.
Update or reinstall Microsoft OneNote.
Open the Microsoft Store, click Library, and choose Get updates to pull the current OneNote build. If OneNote is installed through Microsoft 365, open any Office app, go to File > Account > Update Options > Update Now. If it still crashes after updates, uninstall OneNote from Settings > Apps > Installed apps, restart, and install it again from the Microsoft Store or your Office installer.

Common error messages

“Microsoft OneNote has stopped working” — Windows caught a crash in the app itself, not just a notebook sync problem.
“We’re sorry, OneNote has encountered a problem and needs to close” — OneNote failed during startup, usually because cached local data or a sign-in component is damaged.
“There was a problem opening the notebook” — OneNote got far enough to load the app shell, but one notebook or its sync state is blocking startup.
“Can’t start Microsoft OneNote” — The program files or its Office registration are damaged enough that Windows cannot launch it normally.

When this means it’s a bigger problem

If OneNote crashes on every account, on a freshly created Windows profile, and again after a Repair plus Reset, the problem is no longer just local cache damage. That pattern points to a damaged Office installation, a system-level graphics or profile issue, or a notebook stored in a broken sync state that keeps forcing the crash. At that point, you should stop cycling through resets and contact official Microsoft support with the exact error text and the steps you already tried.

Helpful answers

Frequently Asked Questions

Will resetting Microsoft OneNote delete my notebooks or notes?

No. Resetting Microsoft OneNote clears the app’s local data and startup state, not the notebooks stored in OneDrive or on your device. Your notes stay tied to your account and sync source. If you keep a local notebook file outside OneDrive, back it up first before any uninstall or reinstall.

What should I do if OneNote still crashes after Repair and Reset?

Move to a deeper isolation check: start OneNote in safe mode, then remove any Office add-ins or third-party tools that hook into Office. If the crash continues, the problem is in the Office runtime, your account token, or the notebook sync state rather than the basic app cache. Microsoft OneNote Sync Errors is the next article to use.

Can I fix this by reinstalling Microsoft OneNote without touching Office?

Yes. If you installed OneNote from the Microsoft Store, you can uninstall and reinstall just that app. If OneNote came through Microsoft 365, reinstalling OneNote alone is not the cleanest fix because it shares components with the Office suite. In that case, update Office first and then reinstall from the Office installer if needed.

How do I undo the cache deletion if OneNote starts acting differently afterward?

You do not restore the deleted cache files. OneNote rebuilds fresh cache data the next time it launches, and that new cache becomes the active state. If something looks off after the cleanup, sign out and sign back in, then reopen your notebooks so OneNote can repopulate its local files correctly.

Does a startup crash on one PC mean my notebook is broken everywhere?

No. A startup crash on one PC points to that device’s app state, cache, add-ins, or Office install. If the same notebook opens normally on another device or in OneNote on the web, the notebook itself is intact. If it fails everywhere, the notebook sync state needs attention, not just the local app.