Microsoft is ending support for OneNote for Windows 10 on October 14, 2025, coinciding with the end of support for Windows 10. Users are encouraged to migrate to OneNote on Windows (OneNote M365) to maintain access to features and security updates. OneNote for Windows 10 has been removed from the Microsoft Store and will not receive updates, leading to potential performance issues and diminished functionality. Starting in June 2025, users may experience slower sync performance, and by July 2025, in-app notifications will prompt users to switch to OneNote (M365). The desktop version for Windows 11 will continue to function normally. Microsoft advises transitioning to the latest version of OneNote or considering alternatives like the free web version, SharePoint, Evernote, Google Keep, or Google Docs.