# ONENOTE.EXE

Application Process: Microsoft Corporation

Also called onenote, desktop onenote, onenote 2016

Windows, Application

Desktop OneNote from Microsoft 365 or Office. It is not Word (WINWORD.EXE) and it is not OneNoteM.exe.

## What you need to know

ONENOTE is OneNote, not WINWORD and not OneNoteM.

ONENOTE.EXE is the Win32 desktop OneNote client. WINWORD.EXE is Word. OneNoteM.exe is a different OneNote image Microsoft ships beside it. Ending this process drops unsaved notes in this client only.

- **Safe?**: Yes, from Office

  **Same as Word?**: No. Word is WINWORD.EXE

  **Same as OneNoteM?**: No. That is another OneNote image

Feex says

If the notebook chrome looks like classic OneNote and the name is ONENOTE, I leave WINWORD alone. I also do not end OneNoteM thinking it is the same window.

## What is ONENOTE.EXE?

ONENOTE.EXE is desktop OneNote. It is not WINWORD.EXE and it is not OneNoteM.exe. Click-to-Run places the classic client under Office16.

## What does it do?

It syncs notebooks and hosts add-ins for this desktop build. Word does not store those sections. OneNoteM.exe is a separate OneNote host when that build is installed.

## Why is it running?

You opened a notebook, a .one file, or an Office installer still registered this client. A second OneNote tile may start OneNoteM instead.

## Is it safe?

Usually safe

Office16\ONENOTE.EXE signed by Microsoft is desktop OneNote. onenote.exe in a zip is not. OneNoteM.exe is still a different image.

A legitimate copy normally runs from:

`C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE`

- Desktop OneNote
- Not WINWORD.EXE
- Not OneNoteM.exe

## Can I end it?

You lose unsaved notes in this client

Ending ONENOTE.EXE closes desktop OneNote. Word stays. OneNoteM.exe can stay if that other client is open.

## Can I remove it?

Uninstall or change Office apps

Do not delete ONENOTE.EXE. Use Microsoft 365 Apps setup to remove OneNote. That is not a Word uninstall by itself.

## Should it start with Windows?

On demand unless Send to OneNote or a Startup shortcut starts it.

## Normal resource behavior

These are contextual labels, not universal averages.

- **CPU**: Sync and ink

  **Memory**: Large notebooks and ink cache

  **Disk**: Local cache

  **Network**: OneDrive and SharePoint notebooks

## File information

| Executable name        | ONENOTE.EXE                                                 |
| ---------------------- | ----------------------------------------------------------- |
| Common legitimate path | C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE |
| Publisher              | Microsoft Corporation                                       |
| Signature expectation  | Signed by Microsoft Windows                                 |

## Common problems

### Two OneNote names after an Office update

ONENOTE.EXE is this desktop client. OneNoteM.exe is the other OneNote image. Pick one in Default apps.

### People end WINWORD to stop note sync

Notebooks are not Word documents. Check this process and the OneDrive client.

## Troubleshooting

Diagnose before you change anything destructive.

### See which OneNote tile you launched

Open file location. Office16\ONENOTE.EXE is this article. OneNoteM.exe is the sibling they swapped.

### Repair Office if notebooks will not open

Do not download ONENOTE.EXE from a filename site.

## Technical details

Technical details

| Image name    | ONENOTE.EXE     |
| ------------- | --------------- |
| Friendly name | Desktop OneNote |

## Related

These entities connect to this article. Type is shown on every link.

[WINWORD.EXE: Application Process](https://feex.it/wiki/process/winword.exe)[Microsoft 365: Application](https://feex.it/wiki/software/microsoft-365)

## Sources and verification

Reviewed by Feex editorial. Last verified August 2026 Status: Feex Reviewed. [How we research](https://feex.it/wiki/research).

- [Microsoft Support: OneNote ](https://support.microsoft.com/onenote)· Desktop OneNote help
- [Microsoft Learn: OneNote ](https://learn.microsoft.com/onenote)· OneNote clients
- [Microsoft Learn: Microsoft 365 Apps ](https://learn.microsoft.com/microsoft-365-apps)· Office16 Click-to-Run path
- [Foxhole process map ](https://foxhole.feex.it/)· First-party samples on Windows PCs. Not a lab benchmark.

## Was this article useful?

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Quick facts

The short identity of this page. Specs, sources, and the full story stay in the article.

- **Type**: Application Process

  **Publisher**: Microsoft Corporation

  **Executable**: ONENOTE.EXE

  **Typical path**: C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE

  **Mapped by Feex**: Seen on Windows PCs in Foxhole

  **Parent app**: [Microsoft 365](https://feex.it/wiki/software/microsoft-365)

Feex Reviewed: Last verified August 2026

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Source: [Canonical Feex Wiki page](https://feex.it/wiki/process/onenote.exe/)

[Developer guide](https://feex.it/wiki/developers/) | [API policy](https://feex.it/developers/api-policy/) | [Agent guidance](https://feex.it/wiki/llms.txt)