dot3cfg.dll Troubleshoot and Download

Sometimes Windows system displays error messages regarding corrupted or missing dot3cfg.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 dot3cfg.dll file can therefore effect in failed execution of the started process.

dot3cfg.dll file 802.3 Netsh Helper. 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 dot3cfg.dll related errors on your device. You can also download dot3cfg.dll file compatible with Windows 10, Windows 8.1, Windows 8, Windows 7, Windows 7, Windows Vista, Windows Vista, Windows XP devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows 7, Windows Vista, Windows Vista, Windows XP

File info

General information
Filename dot3cfg.dll
File extension DLL
Description 802.3 Netsh Helper
Program Microsoft® Windows® Operating System
Author Microsoft Corporation
MIME type application/octet-stream
File type Dynamic link library
System Windows NT 32-bit
Copyrights © Microsoft Corporation. All rights reserved.
Character set Unicode
Language cod English (U.S.)

There are various types of errors related to dot3cfg.dll file. dot3cfg.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 dot3cfg.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

  • dot3cfg.dll is corrupted
  • dot3cfg.dll cannot be located
  • Runtime Error - dot3cfg.dll
  • dot3cfg.dll file error
  • dot3cfg.dll file cannot be loaded. Module was not found
  • cannot register dot3cfg.dll file:
  • dot3cfg.dll file could not be loaded
  • dot3cfg.dll file doesn't exist



Application could not be started because dot3cfg.dll file is missing. Reinstall the application to solve the problem.


Problems related to dot3cfg.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 dot3cfg.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.

dot3cfg.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

Virus Scan

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with dot3cfg.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.

Windows Update

Installing relevant Microsoft Windows patches and updates may solve your problems related to dot3cfg.dll file. Use dedicated Windows tool to perform the update.

  1. Go to the Windows "Start" menu
  2. Type "Windows Update" in the search field
  3. Choose the appropriate software program (name may vary depending on your system version)
  4. Check if your system is up to date. If any unapplied updates are listed, install them immediately.
  5. 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 dot3cfg.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

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 dot3cfg.dll file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the dot3cfg.dll file with properly working version. To use the tool:

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

Step 4: Restoring Windows system

Windows Recovery

Another approach is to restore system to previous state, before the dot3cfg.dll file error occured. In order to restore your system, follow the instructions below

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

If all the above-mentioned methods failed and the dot3cfg.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 dot3cfg.dll file

The last solution is to manually download and replace dot3cfg.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 dot3cfg.dll file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of dot3cfg.dll file example directory paths.

  • Windows 10: C:\Windows\System32\
  • Windows 8.1: C:\Windows\System32\
  • Windows 8: 1: C:\Windows\System32\
  • Windows 7: C:\Windows\System32\
  • Windows 7: C:\Windows\System32\
  • Windows Vista: ---
  • Windows Vista: ---
  • Windows XP: ---

If the steps did not solve your dot3cfg.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 dot3cfg.dll
System Windows 10
File size 59904 bytes
Date 2017-03-18
File details
MD5 718a8e6fcae9a0bcb048e13bfea227ac
SHA1 9064bdfcad45a8d0b010febad174ce1533855fb1
SHA256 a6484c2452aaaa2e200c78f1622cc400030dafaa2956d45cc39394aec4bcd212
CRC32 430bb602
Example file location C:\Windows\System32\
Filename dot3cfg.dll
System Windows 8.1
File size 59904 bytes
Date 2014-11-21
File details
MD5 f0f8b3e74047f657e90c281e99d8b543
SHA1 1cbaaaae0c3cd1ccf5be9e7c4d26497ad06c01c3
SHA256 6c3274e287cd82b745a5feef12dfc364836bb13b197a02882b070e686a69f2e6
CRC32 cf8c8ef6
Example file location C:\Windows\System32\
Filename dot3cfg.dll
System Windows 8
File size 57856 bytes
Date 2012-07-26
File details
MD5 6c429f3fe58d9d67e140de4504f7faf0
SHA1 cdc31135b8ce89d62577786e282746da411cf105
SHA256 f5444b3298e90f77713555ed905a497f6a55caeff061b0a71055baaa6e948bfd
CRC32 2e0b4b1b
Example file location 1: C:\Windows\System32\
Filename dot3cfg.dll
System Windows 7
File size 69120 bytes
Date 2010-11-21
File details
MD5 7a09f960c73a63d68293efdfd843a5ff
SHA1 01327cfc0f58322a2aa3390697e06b92d6391f05
SHA256 bc87489ede16aacecf8ed44cce32a52bbfea58c40adce04270d61653cfce5858
CRC32 336a27a5
Example file location C:\Windows\System32\
Filename dot3cfg.dll
System Windows 7
File size 82432 bytes
Date -0001-11-30
File details
MD5 b06b2fec249f48c4e7f628b689859ac7
SHA1 233793f6612f4786c57b36f7b9efc010f9a8bc33
SHA256 dc73bf7c723841fe179fc91c05afcc8d633c839329c04da3e9df5dcdc06a0f77
CRC32 94091fb5
Example file location C:\Windows\System32\
Filename dot3cfg.dll
System Windows Vista
File size 49664 bytes
Date -0001-11-30
File details
MD5 07d79e9b1569ecc5efc487e9f4c8235d
SHA1 f8ab27eb645f56212ef3ddbd7d0584e85c824430
SHA256 d248e2aaefaae1c4998e96d5e6597028f61a470c305ab28ea17ae19d696c0f78
CRC32 5e53685f
Example file location ---
Filename dot3cfg.dll
System Windows Vista
File size 62976 bytes
Date 2009-04-11
File details
MD5 e9b3b0104d974af4ba592c3b0fc30875
SHA1 217211d2c9c7143004ebcf8fdfc994b45b060320
SHA256 a88787193f2692db604156fb6de1115cdb7243f30bcfdce18dbee36737890cab
CRC32 8568fd95
Example file location ---
Filename dot3cfg.dll
System Windows XP
File size 57856 bytes
Date 2008-04-14
File details
MD5 e85fd6aba80bd637aa2aa9d93308d355
SHA1 70c6febb025b89d83d199a37cc547087fda2dddb
SHA256 41ddad888b702d61e497401b87e46e14da345e49cf9b219be4ab06563d4fc0a3
CRC32 9ec8529a
Example file location ---