dot3mm.dll Informations - Download and Fix

Sometimes Windows system displays error messages regarding corrupted or missing dot3mm.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 dot3mm.dll file can therefore effect in failed execution of the started process.

dot3mm.dll file Wired Network Media Manager. 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 dot3mm.dll related errors on your device. You can also download dot3mm.dll file compatible with Windows 10, Windows 8.1, Windows 8 devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows 10, Windows 8.1, Windows 8

File info

General information
Filename dot3mm.dll
File extension DLL
Description Wired Network Media Manager
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 dot3mm.dll file. dot3mm.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 dot3mm.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

  • dot3mm.dll is corrupted
  • dot3mm.dll cannot be located
  • Runtime Error - dot3mm.dll
  • dot3mm.dll file error
  • dot3mm.dll file cannot be loaded. Module was not found
  • cannot register dot3mm.dll file:
  • dot3mm.dll file could not be loaded
  • dot3mm.dll file doesn't exist



Application could not be started because dot3mm.dll file is missing. Reinstall the application to solve the problem.


Problems related to dot3mm.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 dot3mm.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.

dot3mm.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 dot3mm.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 dot3mm.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 dot3mm.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 dot3mm.dll file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the dot3mm.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 dot3mm.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 dot3mm.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 dot3mm.dll file

The last solution is to manually download and replace dot3mm.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 dot3mm.dll file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of dot3mm.dll file example directory paths.

  • Windows 10: C:\Windows\System32\
  • Windows 8.1: C:\Windows\System32\
  • Windows 8: 1: C:\Windows\System32\

If the steps did not solve your dot3mm.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 dot3mm.dll
System Windows 10
File size 146432 bytes
Date 2017-03-18
File details
MD5 0c1abfae2c2a07769994903e88732607
SHA1 047c956ff666d8f7aa7efb1e0a28610cacc81384
SHA256 4b2dbd94e5799976ce5a55b2f1a5092ff2a1d180070bec7982c08cc0974ea867
CRC32 8740e1c7
Example file location C:\Windows\System32\
Filename dot3mm.dll
System Windows 8.1
File size 128000 bytes
Date 2014-11-21
File details
MD5 235c4ff3c54d1f67d2d00ea5008ecebf
SHA1 694b82e2f098e7e1554b536bad0b35df3cef09f8
SHA256 50e3056f7180948296cc64c6ce0f44334ef2eb2e66571147c484fc0f855b990a
CRC32 67a337ca
Example file location C:\Windows\System32\
Filename dot3mm.dll
System Windows 8
File size 186880 bytes
Date 2012-07-26
File details
MD5 50d3af6799df7465b05b0395d3d85e0c
SHA1 2d98216f3d4aaf2de5fda38b276cf8018f7eb167
SHA256 d53a0c95b678344556566eb23ec5440abf353edba8ea44394200305d6d372ba1
CRC32 3162c768
Example file location 1: C:\Windows\System32\