Download dot3dlg.dll to Fix Errors

Sometimes Windows system displays error messages regarding corrupted or missing dot3dlg.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 dot3dlg.dll file can therefore effect in failed execution of the started process.

dot3dlg.dll file 802.3 UI 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 dot3dlg.dll related errors on your device. You can also download dot3dlg.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 dot3dlg.dll
File extension DLL
Description 802.3 UI 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 dot3dlg.dll file. dot3dlg.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 dot3dlg.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

  • dot3dlg.dll is corrupted
  • dot3dlg.dll cannot be located
  • Runtime Error - dot3dlg.dll
  • dot3dlg.dll file error
  • dot3dlg.dll file cannot be loaded. Module was not found
  • cannot register dot3dlg.dll file:
  • dot3dlg.dll file could not be loaded
  • dot3dlg.dll file doesn't exist



Application could not be started because dot3dlg.dll file is missing. Reinstall the application to solve the problem.


Problems related to dot3dlg.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 dot3dlg.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.

dot3dlg.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 dot3dlg.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 dot3dlg.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 dot3dlg.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 dot3dlg.dll file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the dot3dlg.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 dot3dlg.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 dot3dlg.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 dot3dlg.dll file

The last solution is to manually download and replace dot3dlg.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 dot3dlg.dll file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of dot3dlg.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 dot3dlg.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 dot3dlg.dll
System Windows 10
File size 48640 bytes
Date 2017-03-18
File details
MD5 18a594315cbdeb39b2f45d52538705be
SHA1 f3646b5f0c7fa74cbf493b0eb3cf99c71a0f9021
SHA256 5323923907b866973f79eb5ed552ce35da6dd5a95d9c2a699f0ea569a9dfbb29
CRC32 132dd69b
Example file location C:\Windows\System32\
Filename dot3dlg.dll
System Windows 8.1
File size 49152 bytes
Date 2014-11-21
File details
MD5 bc3f6dbbe0bf922f77eaf5b46b771c4c
SHA1 a9d02a3469a62bf242c9f0064770710169070427
SHA256 ba1823bd3ebddd40f9485a9699ae450d33800407adccc10e66b72cf461518508
CRC32 b4c2a761
Example file location C:\Windows\System32\
Filename dot3dlg.dll
System Windows 8
File size 46592 bytes
Date 2012-07-26
File details
MD5 975f9b83e387c863d89cc429a93a8385
SHA1 1e5a7da7e7df920b77859518f6d170bdd348f9f2
SHA256 d0cfe99bc904ea10863666a62c4a26beacccdb7c758c6357e943c612b7acbeeb
CRC32 2f4d2d3b
Example file location 1: C:\Windows\System32\
Filename dot3dlg.dll
System Windows 7
File size 57856 bytes
Date 2009-07-14
File details
MD5 610a9f25c9589b90846b528b91f794d3
SHA1 e83cb7ca8c09e3ddfa32acfebec6f53124f9550a
SHA256 eccf7662db67611fb736e3ea54534b97203ab4849ce658deaa98a7dc9bcd6904
CRC32 bdd0c444
Example file location C:\Windows\System32\
Filename dot3dlg.dll
System Windows 7
File size 47104 bytes
Date -0001-11-30
File details
MD5 b05537d790dd533bf6695b8c85e98e8b
SHA1 f019368f994afaaea3d25c7d59053b4c05ba6206
SHA256 de6c4187c8f51f3de38230057a8945b490b8abae910a7d172cb7e82180a0eebd
CRC32 63869201
Example file location C:\Windows\System32\
Filename dot3dlg.dll
System Windows Vista
File size 55296 bytes
Date 2008-01-21
File details
MD5 110936414e7757318045aba3010e3566
SHA1 8f03bca0dd3cd2cce3106e3a317b5b873b9980af
SHA256 0a997ad7bec183a0a4fe05978e39dbb7d92e18d76a4c1e9cda31334c859452b1
CRC32 7e4690ba
Example file location ---
Filename dot3dlg.dll
System Windows Vista
File size 45568 bytes
Date -0001-11-30
File details
MD5 26ed466b32392df1568af94f9c92e56c
SHA1 d8f2d483dac93e2a61868cdffaab0b0fb0673144
SHA256 77dd622a6b4a6f62ee9d735afa979f9babb5d332623140aec8d728037cc5e2c7
CRC32 382c7ba0
Example file location ---
Filename dot3dlg.dll
System Windows XP
File size 9216 bytes
Date 2008-04-14
File details
MD5 4e8f3230bac8c1caadf01a8c728e1c5c
SHA1 1fab45cb9bcec525d36a32055a0e70f0e0ac94cf
SHA256 62e73a7d4c58f2e30670f6a72e734b618af45f60a8cb2177a4d504283f829be5
CRC32 c7e6efc1
Example file location ---