When OneNote shows "Not Responding", it usually means the app is stuck during a task (syncing, loading a large notebook, ...

In this post, we will see how to fix OneNote sync error 0xE4020045 (Unsupported Client). Because this is a OneNote sync error, you will not be able to sync your ...

Use the following fixes if you cannot edit your OneNote notebook due to the “You can’t edit this notebook” error. I also encountered this error. In my case, it ...