Repair and Download dot3ui.dll Now

Sometimes Windows system displays error messages regarding corrupted or missing dot3ui.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 dot3ui.dll file can therefore effect in failed execution of the started process.

dot3ui.dll file 802.3 Advanced UI. 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 dot3ui.dll related errors on your device. You can also download dot3ui.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 dot3ui.dll
File extension DLL
Description 802.3 Advanced UI
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 dot3ui.dll file. dot3ui.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 dot3ui.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

  • dot3ui.dll is corrupted
  • dot3ui.dll cannot be located
  • Runtime Error - dot3ui.dll
  • dot3ui.dll file error
  • dot3ui.dll file cannot be loaded. Module was not found
  • cannot register dot3ui.dll file:
  • dot3ui.dll file could not be loaded
  • dot3ui.dll file doesn't exist



Application could not be started because dot3ui.dll file is missing. Reinstall the application to solve the problem.


Problems related to dot3ui.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 dot3ui.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.

dot3ui.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 dot3ui.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 dot3ui.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 dot3ui.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 dot3ui.dll file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the dot3ui.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 dot3ui.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 dot3ui.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 dot3ui.dll file

The last solution is to manually download and replace dot3ui.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 dot3ui.dll file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of dot3ui.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 dot3ui.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 dot3ui.dll
System Windows 10
File size 288768 bytes
Date 2017-03-18
File details
MD5 5e682e00ade65f7d21c74a25fe24227f
SHA1 2039cf04e8a8447ced2ea767e932aa57626314d7
SHA256 21c9b617d030c26c017ab7708f4646260fcbd39e4faf7c662c171c6de6a6cf88
CRC32 212e8552
Example file location C:\Windows\System32\
Filename dot3ui.dll
System Windows 8.1
File size 292352 bytes
Date 2014-11-21
File details
MD5 f176802e66f206db4492613ea4e4576b
SHA1 4005de5e8a16d880be9b668f4ec398c6b9400f66
SHA256 e6eda0bf32cb3c260cffc3d798791b75277b079d297ecbb4bc342a2fe01c642f
CRC32 2d7df08e
Example file location C:\Windows\System32\
Filename dot3ui.dll
System Windows 8
File size 285696 bytes
Date 2012-07-26
File details
MD5 d79d659b38c910e98de6d6630c8c1ff7
SHA1 f28202b405a9916a3fd461d9444a02b078d9542b
SHA256 bcfda68166ea4f8385b7bf77f4e72d7b9e3edded48fcad8b03bd9f4576b58dcb
CRC32 6a0ce904
Example file location 1: C:\Windows\System32\
Filename dot3ui.dll
System Windows 7
File size 313344 bytes
Date 2010-11-21
File details
MD5 8888dc2acebfe75b3b52ce01ab2249c3
SHA1 e9ec76d43f72df159584c8321b2119b8c502cb1f
SHA256 0fef15696ecdf275c23979025e72a8bc8df8b2a5994fbfe8cfe20140739915a0
CRC32 1878bcaf
Example file location C:\Windows\System32\
Filename dot3ui.dll
System Windows 7
File size 333824 bytes
Date -0001-11-30
File details
MD5 8fbe98499adc541c63bb10b722da00d4
SHA1 a558e7b61b27cfc20569bbc1ddc33a5e9f541cb8
SHA256 a3b5e0722576ace99b8537458bcae2147df09520caf11138a8a5e87c041b18c6
CRC32 2abbf1ca
Example file location C:\Windows\System32\
Filename dot3ui.dll
System Windows Vista
File size 142848 bytes
Date -0001-11-30
File details
MD5 8071c33e6508ee2a4bdbab77cfab807b
SHA1 25d46cf7f51e0ca604788b3f2fd1c06e206ec9b0
SHA256 c3406033150240a2f66173af6deec5564069ecbd63f36ce95f6955b97e46a3a9
CRC32 c5c38180
Example file location ---
Filename dot3ui.dll
System Windows Vista
File size 154624 bytes
Date 2008-01-21
File details
MD5 f93c32afb7f2eaa60b88e5edd1871a2d
SHA1 921f189c4a8a32ef3cdcda8558c02b27f5d552ce
SHA256 0bce95a41baa69370a26f58516dd6703523e0b51c60e4dcc04d1010ee5bf758d
CRC32 dbaef2c1
Example file location ---
Filename dot3ui.dll
System Windows XP
File size 650752 bytes
Date 2008-04-14
File details
MD5 f21a712eb2b656cd86fcc057446f9c34
SHA1 6d92bd5268bc1062d720bc01f32292abfce70d3a
SHA256 a16529241505552ea614d030ac7536dcef180075924adb7e4cdb79385d40ad27
CRC32 18f19557
Example file location ---