Microsoft Microsoft Office 2013 Professional BAK onmain.dll.bak

How to Download, Fix, and Update Onmain.dll.bak

Last Updated: 12/16/2023
[Time Needed for Reading: ~4-6 minutes]

The development of Microsoft OneNote by Microsoft prompted the latest creation of onmain.dll.bak. It is also known as a Microsoft OneNote Main file (file extension BAK), which is classified as a type of Win32 DLL (Dynamic link library) file.

onmain.dll.bak was initially released with Microsoft Office 2013 Professional (not specified) on 01/30/2013 for the Windows 10 Operating System. According to our records, this release is the only version of this file offered by Microsoft.

This article discusses complete file details, BAK file troubleshooting instructions for problems with onmain.dll.bak, and a comprehensive set of free downloads for every file version that has been catalogued by our team.

File Analysis Provided by Jason Geater (Author)


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File Overview


General Information ✻
File Name: onmain.dll.bak
File Extension: BAK file extension
Description: Microsoft OneNote Main
Object File Type: Dynamic link library
File Operating System: Windows NT 32-bit
MIME Type: application/octet-stream
User Popularity Rating:
 
Developer and Software Information
Software Developer: Microsoft Corporation
Software Program: Microsoft OneNote
Developer: Microsoft
Software: Microsoft Office 2013 Professional
Software Version: (not specified)
File Details
Character Set: Windows, Latin1
Language Code: Neutral
File Flags: (none)
File Flags Mask: 0x003f
Entry Point: 0x262b8
Code Size: 8503808
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What are onmain.dll.bak Error Messages?


General onmain.dll.bak Runtime Errors

onmain.dll.bak file errors often occur during the startup phase of Microsoft Office 2013 Professional, but can also occur while the program is running. These types BAK errors are also known as “runtime errors” because they occur while Microsoft Office 2013 Professional is running. Here are some of the most common onmain.dll.bak runtime errors:

Microsoft Visual C++ Runtime Library

Runtime Error!

Program: C:\Program Files\Microsoft Office 15\root\office15\onmain.dll.bak

This application has requested the Runtime to terminate it in an unusual way.
Please contact the application's support team for more information.


Most BAK errors are due to missing or corrupt files. Your onmain.dll.bak file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Microsoft Office 2013 Professional), or deleted by a malware infection. Furthermore, onmain.dll.bak file corruption could be caused from a power outage when loading Microsoft Office 2013 Professional, system crash while loading or saving onmain.dll.bak, bad sectors on your storage media (usually your primary hard drive), or malware infection. Thus, it’s critical to make sure your anti-virus is kept up-to-date and scanning regularly.

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How to Fix onmain.dll.bak Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your onmain.dll.bak issue. These troubleshooting steps are listed in the recommended order of execution.


Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. When you see the search box, type "System Restore" and press "ENTER".
  3. In the search results, find and click System Restore.
  4. Please enter the administrator password (if applicable / prompted).
  5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
  6. Restore your computer to that backup image.

If the Step 1 fails to resolve the onmain.dll.bak error, please proceed to the Step 2 below.

Step 2: If recently installed Microsoft Office 2013 Professional (or related software), uninstall then try reinstalling Microsoft Office 2013 Professional software.

You can uninstall Microsoft Office 2013 Professional software by following these instructions (Windows XP, Vista, 7, 8, and 10):

  1. Hit the Windows Start button
  2. In the search box, type "Uninstall" and press "ENTER".
  3. In the search results, find and click "Add or Remove Programs"
  4. Find the entry for Microsoft Office 2013 Professional (not specified) and click "Uninstall"
  5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall Microsoft Office 2013 Professional software.

If this Step 2 fails as well, please proceed to the Step 3 below.

Microsoft Office 2013 Professional (not specified)

Microsoft Corporation

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many onmain.dll.bak error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

  1. Hit the Windows Start button
  2. In the search box, type "Update" and press "ENTER".
  3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
  4. If updates are available for download, click "Install Updates".
  5. After the update is completed, restart your PC.

If Windows Update failed to resolve the onmain.dll.bak error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

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If Those Steps Fail: Download and Replace Your onmain.dll.bak File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate onmain.dll.bak file version. We maintain a comprehensive database of 100% malware-free onmain.dll.bak files for every applicable version of Microsoft Office 2013 Professional. Please follow the steps below to download and properly replace you file:

  1. Locate your Windows operating system version in the list of below "Download onmain.dll.bak Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. Copy this file to the appropriate Microsoft Office 2013 Professional folder location:
    Windows 10: C:\Program Files\Microsoft Office 15\root\office15\
  4. Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.


GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve onmain.dll.bak problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.

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Download onmain.dll.bak Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying onmain.dll.bak to your appropriate Windows system directory. Microsoft typically does not release Microsoft Office 2013 Professional BAK files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing onmain.dll.bak and all other BAK files for Microsoft Office 2013 Professional. An incorrectly installed BAK file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 10
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Files Related to onmain.dll.bak


BAK Files Related to onmain.dll.bak

File Name Description Software Program (Version) File Size (bytes) File Location
misc.exe.bak Microsoft Office 2013 component Microsoft Office 2013 (15.0.4420.1017) 1026672 C:\Windows\SystemApps\Microsoft.Windows.Cortana...
outlook.exe.bak Microsoft Outlook Microsoft Outlook (15.0.4433.1506) 18379352 C:\Program Files\WindowsApps\Microsoft.WindowsM...
acedao.dll.bak Microsoft Access database engine Data Access Object Library Microsoft Office 2013 (15.0.4433.1506) 432304 C:\Windows\SystemApps\Microsoft.Windows.Cortana...
powerpnt.exe.bak Microsoft PowerPoint Microsoft Office 2013 (15.0.4433.1506) 1846872 C:\Windows\SystemApps\Microsoft.Windows.Cortana...
c2r32.dll.bak General Backup Microsoft Office 2013 Professional (not specified) 344656 C:\Windows\Temp\527D94AF-D053-4381-B105-0D815D5...

Other Files Related to onmain.dll.bak

File Name Description Software Program (Version) File Size (bytes) File Location
OneX_v1.xsd XML Schema Definition Windows 8 5957 C:\Windows\L2Schemas\
OneX_v1.xsd XML Schema Definition Windows 10 5957 C:\Windows\L2Schemas\
WWAN_profile_v1.xsd XML Schema Definition Windows 7 6201 C:\Windows\L2Schemas\
WLANAP_profile_v1.xsd XML Schema Definition Windows 8 7504 C:\Windows\L2Schemas\
WLANAP_profile_v1.xsd XML Schema Definition Windows 8.1 7548 C:\Windows\L2Schemas\


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