ONETOC2 File: What is it?

By:   |   Amended: November 26, 2018

Microsoft Silver

ONETOC2 File Summary

There is one file type associated with the ONETOC2 File Extension, the Microsoft OneNote Table Of Contents File format. According to our database, only Microsoft OneNote from Microsoft Corporation will enable you to view these files. The majority of ONETOC2 files are considered Settings Files.

File Extension ONETOC2 files have been identified on both desktop and mobile devices. They are fully or partially supported by Windows, Mac, and iOS. The Popularity Rating for ONETOC2 files is "Low", which means these files are not ordinarily found on an everyday user's device.

Please see the detailed information below to learn more about ONETOC2 files and the programs that can open them. In addition, we provide simple troubleshooting information to help you open your ONETOC2 file.

Low
Universality
8234
File Rank

/ 11690

Active

Mode

26

November

2018

Updated

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Types of ONETOC2 Files


Chief ONETOC2 Description

.ONETOC2
Extension:.onetoc2
Classification:Microsoft OneNote Table Of Contents File

ONETOC2 file is an index file that stores information about the ordering of different note-taking sections. It allows to organize the collection of notes in the notebook.

Created by: Microsoft Corporation
Function:Settings Files
Key: HKEY_CLASSES_ROOT\.onetoc2

Software Programs That Open The Microsoft OneNote Table Of Contents File:


Microsoft OneNote by Microsoft Corporation

Windows
Windows Phone
Mac
iOS
Android

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ONETOC2 Requests


Device Used

Desktop (84.34%)
Mobile (14.29%)
Tablet (1.37%)


ONETOC2 File Complications


Troubles Opening ONETOC2 Files

Microsoft OneNote Isn't There

When you double-click your ONETOC2 file, you may see a dialog box from your operating system stating that it "Cannot Open This File Type". When this happens, it is commonly due to Microsoft OneNote missing in %%os%%. Because your operating system doesn't know what to do with this file, you won't be able to open it by double-clicking.


Tip: When another ONETOC2 application is installed, you can choose to open it by selecting "Show Apps" and using that program.


Outdated Microsoft OneNote

In other instances, your Microsoft OneNote Table Of Contents File file version may not be supported by your version of Microsoft OneNote. Installing the latest version of Microsoft OneNote from Microsoft Corporation is recommended. This problem is predominately due to having a Microsoft OneNote Table Of Contents File file version that was created by a newer version of Microsoft OneNote than what you have installed on your PC.


Tip: Find clues on the correct software version by right-clicking your ONETOC2 file and clicking "Properties".


Summary: In either case, the majority of problems opening ONETOC2 files are related to not having the correct software application installed on your computer.


Associated Difficulties Loading ONETOC2 Files

In the majority of cases, installing the right version of Microsoft OneNote will resolve your issue. Other ONETOC2 opening errors can be created by other system problems inside of %%os%%. Problems unrelated to software:

  • File references in the Windows Registry for ONETOC2 are wrong
  • The ONETOC2 file description within the Windows Registry was removed
  • Incomplete or bad installation of a software application associated with the ONETOC2 format
  • ONETOC2 file corruption
  • Your ONETOC2 has adversely impacted by malware
  • Hardware associated with ONETOC2 has outdated drivers
  • Your PC doesn’t have enough available resources to open the Microsoft OneNote Table Of Contents File file

Quiz: Which file extension is not a type of document?









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