How to Repair cmdext.dll? Download Now

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

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

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



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


Problems related to cmdext.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 cmdext.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.

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

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

Go to the folder where the file should be located and paste the downloaded file. Below is the list of cmdext.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 cmdext.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 cmdext.dll
System Windows 10
File size 19968 bytes
Date 2017-03-18
File details
MD5 14e19f35b63868be1228ecc3a82a06bf
SHA1 54944d568a70efff5a952d291171d53f7983f150
SHA256 7ddc6acb7ab1449591e6755b535e1230da3b35a2b7f50fdf2e053e094644fa02
CRC32 f929f576
Example file location C:\Windows\System32\
Filename cmdext.dll
System Windows 8.1
File size 10240 bytes
Date 2014-11-21
File details
MD5 4ae1645286d07af628ddb2ae978ce526
SHA1 36f5625f17af8be38888d75750a728233a1e44b1
SHA256 f7df65aea001f78fa3e7a009a599b36c7bac9d9e430c52e772bf192df26bf93a
CRC32 650c3086
Example file location C:\Windows\System32\
Filename cmdext.dll
System Windows 8
File size 9728 bytes
Date 2012-07-26
File details
MD5 f2e12b5b7eede6854104e5af8ac841a8
SHA1 1a5a818a8db53a679390ae3868764cacaeaee733
SHA256 733dd36d212a4793475f917e92755290cfe3942d1751cfc60a94b223f88043ee
CRC32 19790dd3
Example file location 1: C:\Windows\System32\