Onenote Portable Portable | Microsoft

Never use a portable version of OneNote on a computer you do not own (e.g., library, work PC, friend’s laptop) without explicit permission and without understanding data leakage risks.

The most "portable" way to access your notes on any computer without installing software is Microsoft OneNote for the Web Microsoft Onenote Portable

Doesn't clutter the Windows Registry or system folders like the standard Office suite. Never use a portable version of OneNote on