ONMAIN.DLL - Repair Issues and Download

Sometimes Windows system displays error messages regarding corrupted or missing ONMAIN.DLL files. Situations like that can occur, for example, during a software installation process. Each software program requires certain resources, libraries, and source data to work properly. Corrupted or nonexistent ONMAIN.DLL file can therefore effect in failed execution of the started process.

ONMAIN.DLL file Microsoft OneNote Main. The file was developed by for use with software. Here you will find detailed information about the file and instructions how to proceed in the event of ONMAIN.DLL related errors on your device. You can also download ONMAIN.DLL file compatible with Windows 10, Windows 7, Windows Vista devices which will (most probably) allow you to solve the problem.

Compatible with: Windows 10, Windows 7, Windows Vista

User popularity

3.1 Scanning for malicious software
3.2 System and driver update
3.3 System File Checker tool
3.4 System recovery

4 Download ONMAIN.DLL

4.1 List of ONMAIN.DLL file versions

File info

General information
Filename	ONMAIN.DLL
File extension	DLL
Description	Microsoft OneNote Main

Software
Program	Microsoft OneNote
Author	Microsoft Corporation

Details
MIME type	application/octet-stream
File type	Dynamic link library
System	Windows NT 32-bit
Copyrights	© 2010 Microsoft Corporation. All rights reserved.
Character set	Windows, Latin1
Language cod	Neutral

Most common ONMAIN.DLL file related problems

There are various types of errors related to ONMAIN.DLL file. ONMAIN.DLL file may be located in wrong file directory on your device, may not be present in the system, or may be infected with malicious software and therefore not work correctly. Below is a list of most common error messages related to ONMAIN.DLL file. If you encounter one listed below (or similar), please consider the following suggestions.

ONMAIN.DLL is corrupted
ONMAIN.DLL cannot be located
Runtime Error - ONMAIN.DLL
ONMAIN.DLL file error
ONMAIN.DLL file cannot be loaded. Module was not found
cannot register ONMAIN.DLL file:
ONMAIN.DLL file could not be loaded
ONMAIN.DLL file doesn't exist

ONMAIN.DLL

Application could not be started because ONMAIN.DLL file is missing. Reinstall the application to solve the problem.

Problems related to ONMAIN.DLL can be addressed in various ways. Some methods are meant only for advanced users. If you don't have confidence in your skills, we suggest consulting a specialist. Fixing ONMAIN.DLL file errors should be approached with utmost caution for any mistakes can result in unstable or unproperly working system. If you have the necassary skills, please proceed.

How to fix ONMAIN.DLL errors in just few steps?

Remember, before taking any action related to system files perform a backup copy of your data!

ONMAIN.DLL file errors can be caused by various factors, so its is beneficial to try to fix them using various methods.

Step 1: Scan your computer for any malicious software

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with ONMAIN.DLL file or any other Windows system files should be scanning the system for malicious software using an antivirus tool.

If by any chance you don't have any antivirus software installed on your system yet, you should do it immediately. Unprotected system is not only a source of file errors, but, more importantly, makes your system vulnerable to many dangers. If you don't know which antivirus tool to choose, consult this Wikipedia article – comparison of antivirus software.

Step 2: Update your system and drivers.

Installing relevant Microsoft Windows patches and updates may solve your problems related to ONMAIN.DLL file. Use dedicated Windows tool to perform the update.

Go to the Windows "Start" menu
Type "Windows Update" in the search field
Choose the appropriate software program (name may vary depending on your system version)
Check if your system is up to date. If any unapplied updates are listed, install them immediately.
After the update has been done,restart your computer in order to complete the process.

Beside updating the system, it is recommended that you install latest device drivers, as drivers can influence proper working of ONMAIN.DLL or other system files. In order to do so, go to your computer or device producer's website where you will find information regarding latest driver updates.

Step 3: Use System File Checker (SFC) tool

System File Checker is a Microsoft Windows tool. As the name suggests, the tool is used for identyfing and addressing system file related errors, including those related to ONMAIN.DLL file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the ONMAIN.DLL file with properly working version. To use the tool:

Go to the Windows "Start" menu
Type "cmd" in the search field
Locate "Command Prompt" result – don't run it yet:
Click the right mouse button and select "Run as Administrator" option
Type "sfc /scannow" in console prompt to start the program and follow the instructions

Step 4: Restoring Windows system

Another approach is to restore system to previous state, before the ONMAIN.DLL file error occured. In order to restore your system, follow the instructions below

Go to the Windows "Start" menu
Type "System Restore" in the search field
Start the system restore tool – it's name may differ depending on version of the system
The application will guide you through the process – read the messages carefully
After the process has finished, restart your computer.

If all the above-mentioned methods failed and the ONMAIN.DLL file problem has not been resolved, proceed to the next step. Remember that the following steps are intended only for advanced users.

Download and replace ONMAIN.DLL file

The last solution is to manually download and replace ONMAIN.DLL file in appropriate folder on the disk. Select file version compatible with your operating system and click the "Download" button. Next, go to your web browser's "Downloaded" folder and copy the downloaded ONMAIN.DLL file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of ONMAIN.DLL file example directory paths.

Windows 10: C:\Program Files\Microsoft Office\Office15\
Windows 7: C:\Program Files (x86)\Microsoft Office\Office14\
Windows Vista: C:\Program Files (x86)\Microsoft Office\Office12\

If the steps did not solve your ONMAIN.DLL file problem, you should consult a professional. A probability exists that the error(s) might be device-related and therefore should be resolved at the hardware level. A fresh operating system installation might be necessary – a faulty system installation process can result in data loss.

File versions list

Filename ONMAIN.DLL

System Windows 10

File size 9594544 bytes

Date 2017-05-10

Download

File details
	MD5	63d138dfb0a5caf0ae515018958d39f7
	SHA1	c3e62e49aee02a300d9f4176c62ff665decbd44d
	SHA256	fd0d3c8979301f44fb64bb312ed8d690d29d675597f2a5b59e87a3cb9773c5a5
	CRC32	f2d8e1e9
	Example file location	C:\Program Files\Microsoft Office\Office15\

Filename ONMAIN.DLL

System Windows 7

File size 9182056 bytes

Date 2017-05-10

Download

File details
	MD5	dc430886f1e9f398087ac13b05d0f13f
	SHA1	a2bba95fc344c28d70595ca822c301219685cc30
	SHA256	c82fdd21fbee87e798d6177990e22bab9ad04fd9fdee015143a6b160bde3ae01
	CRC32	dd4296e3
	Example file location	C:\Program Files (x86)\Microsoft Office\Office14\

Filename ONMAIN.DLL

System Windows Vista

File size 6579512 bytes

Date 2017-05-10

Download

File details
	MD5	e59fa7ed5c66213c9661b514cda511f4
	SHA1	d31f223daca8e59e0658756858d1c76d3f5c12dc
	SHA256	5aa7d901f1d5a3dfe35b45f902e7607d2e9acc6157f2c734251e67cec2b25fd9
	CRC32	755455eb
	Example file location	C:\Program Files (x86)\Microsoft Office\Office12\