dot3hc.dll - How to Fix? Download Now

Sometimes Windows system displays error messages regarding corrupted or missing dot3hc.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 dot3hc.dll file can therefore effect in failed execution of the started process.

dot3hc.dll file Dot3 Helper Class. 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 dot3hc.dll related errors on your device. You can also download dot3hc.dll file compatible with Windows 10, Windows 8.1, Windows 8, Windows 7, Windows 7 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

File info

General information
Filename dot3hc.dll
File extension DLL
Description Dot3 Helper Class
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 dot3hc.dll file. dot3hc.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 dot3hc.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

  • dot3hc.dll is corrupted
  • dot3hc.dll cannot be located
  • Runtime Error - dot3hc.dll
  • dot3hc.dll file error
  • dot3hc.dll file cannot be loaded. Module was not found
  • cannot register dot3hc.dll file:
  • dot3hc.dll file could not be loaded
  • dot3hc.dll file doesn't exist



Application could not be started because dot3hc.dll file is missing. Reinstall the application to solve the problem.


Problems related to dot3hc.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 dot3hc.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.

dot3hc.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 dot3hc.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 dot3hc.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 dot3hc.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 dot3hc.dll file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the dot3hc.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 dot3hc.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 dot3hc.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 dot3hc.dll file

The last solution is to manually download and replace dot3hc.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 dot3hc.dll file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of dot3hc.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\SysWOW64\
  • Windows 7: C:\Windows\SysWOW64\

If the steps did not solve your dot3hc.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 dot3hc.dll
System Windows 10
File size 55808 bytes
Date 2017-03-18
File details
MD5 64211eb58bfa041274699a17e5a94fba
SHA1 8f60930f0d0f5709e1da9f17b7cec8208e77d42a
SHA256 b9dfce19ade63182df0ebfef7592d7cb40e265ca4dbc057383d56bcc8f6daec7
CRC32 b1ba8c86
Example file location C:\Windows\System32\
Filename dot3hc.dll
System Windows 8.1
File size 54272 bytes
Date 2014-11-21
File details
MD5 560ae573e47c819ffbee3954f5f2e04e
SHA1 695d74d23bc15bf6820fb61a65ed2d85963b0948
SHA256 7dc108161e8a16f71e4d8160966be5d3064c3260c6e0dae85cc7f2a623ad780b
CRC32 3f1020df
Example file location C:\Windows\System32\
Filename dot3hc.dll
System Windows 8
File size 52224 bytes
Date 2012-07-26
File details
MD5 ed41e56a74c58d67203ecd3c4c418829
SHA1 1d4e665ea1d66a106426e994c7a05dbd985430e0
SHA256 21a1572f89455ecf3a0f62da1fc072f9e0bbd5613b3438e1bec44094193422f7
CRC32 ca4862bd
Example file location 1: C:\Windows\System32\
Filename dot3hc.dll
System Windows 7
File size 55296 bytes
Date -0001-11-30
File details
MD5 3ef520a077afa7acc076fb3e0fe42ff5
SHA1 d9b75851ca80abef408f3145ab701d123ac702fa
SHA256 2ae399e8e20118dafb5588a2af9541e58cba27452dd2796ae8d8a5fb981599cd
CRC32 3fec8d3a
Example file location C:\Windows\SysWOW64\
Filename dot3hc.dll
System Windows 7
File size 69632 bytes
Date 2009-07-14
File details
MD5 cc100d183bbeff4491155e3a88dd586d
SHA1 047761efa4737da6a71011dbc28e6a4460c757d6
SHA256 5b8e5cd8a5c88c8f61e12148eb189ae02f137cc880d6264696bdc4b4c64540f5
CRC32 deea950d
Example file location C:\Windows\SysWOW64\