Office Apps Crashing

How to Fix OneNote Crashing While Synchronizing a Notebook

John Wilson Oct 13, 2026 868 views

Question details

The user needs a solution to prevent Microsoft OneNote from continuously crashing when it attempts to synchronize a notebook.

Fix OneNote Crashing While Synchronizing a Notebook on Windows 11

Product: Microsoft OneNote
Device & OS: Windows 11
Scenario: Synchronizing an offline notebook to the cloud via the desktop application.
Observed behavior: The OneNote application closes unexpectedly or crashes during the notebook synchronization process.

Before you start

Log into OneNote for the web first to verify that your recent notes are safely stored online, preventing accidental data loss before clearing any local files.

Solution 1Recommended

Clear the Local OneNote Cache and Reset Credentials

Corrupted local cache data and outdated Windows credentials are the most common reasons for sync-related crashes.

OneNote relies on a local cache to temporarily store offline edits. When this folder becomes corrupted, the app fails to sync properly and often crashes. Clearing the cache forces OneNote to rebuild its sync files from the cloud.

Verify Synchronization Online

Open OneNote Online in your web browser. Confirm that the notebook is accessible and has synchronized properly on the web. Close the notebook in your desktop app.

Delete the Cache Folder

Close OneNote entirely. Press Win + R on your keyboard, paste the path C:\Users\<username>\AppData\Local\Microsoft\OneNote\16.0 (replace <username> with your actual Windows username), and press Enter. Delete the cache folder found in this directory.

Remove Old Office Credentials

Open the Windows Control Panel. Navigate to User Accounts > Credential Manager > Windows Credentials. Locate all credentials associated with Microsoft Office and click 'Remove'. Restart your PC and sign back into OneNote.

Clear the Local OneNote Cache and Reset Credentials

Warning on Unsynced Notes: Deleting the local cache will permanently erase any offline changes that have not yet been synchronized to the cloud. Make sure to back up unsynced text manually if possible.

Solution 2

Run an Online Repair or Reinstall Microsoft 365

If cache clearance does not work, the Microsoft Office suite installation may be damaged and require a repair or fresh installation.

Free Microsoft Office alternative

Try WPS Office for a Stable, Crash-Free Document Experience

If Microsoft Office applications frequently crash or slow down your PC during critical tasks, consider switching to WPS Office. It provides a lightweight, highly compatible alternative for Word, Excel, and PowerPoint files without demanding heavy system resources.

1. Download and Install: Visit the WPS Office website to download the free installer. The lightweight installation takes only minutes to complete.
2. Open Your Files Seamlessly: Launch WPS Office and open your existing Microsoft Office documents. Your original formatting and layouts will be preserved perfectly.

Fully compatible with Microsoft Office formats, including .docx, .xlsx, and .pptx.Lightweight architecture that runs smoothly on Windows 11 without frequent crashing.All-in-one tabbed interface allows you to manage documents, spreadsheets, and presentations in a single window.Free to use with a familiar design, requiring zero learning curve to migrate.

microsoft office alternative - wps office

Frequently Asked Questions

Why does OneNote crash on my desktop but work fine on the web app?

The desktop application relies on local cache files to manage synchronization between offline edits and the cloud server. If this local cache becomes corrupted or overly large, it triggers application crashes. The web app interacts directly with the server, bypassing local cache issues entirely.

Will I lose my notebooks if I uninstall and reinstall Microsoft 365 Apps?

No, your notebooks are safely stored in your OneDrive or SharePoint account. Reinstalling the application only removes the local software files. Once you reinstall and sign back in, your notebooks will download and sync again automatically.

What is the difference between OneNote for Windows 10 and the Microsoft 365 OneNote app?

OneNote for Windows 10 is an older, pre-installed UWP application that Microsoft is phasing out. The Microsoft 365 OneNote app (previously known as OneNote 2016) is the unified, actively supported desktop version that comes with modern Office installations and receives the latest features.

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