Fix ksproxy.ax Errors

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

ksproxy.ax file WDM Streaming ActiveMovie Proxy. 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 ksproxy.ax related errors on your device. You can also download ksproxy.ax 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 ksproxy.ax
File extension AX
Description WDM Streaming ActiveMovie Proxy
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 Neutral

There are various types of errors related to ksproxy.ax file. ksproxy.ax 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 ksproxy.ax file. If you encounter one listed below (or similar), please consider the following suggestions.

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



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


Problems related to ksproxy.ax 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 ksproxy.ax 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.

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

The last solution is to manually download and replace ksproxy.ax 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 ksproxy.ax file.

Go to the folder where the file should be located and paste the downloaded file. Below is the list of ksproxy.ax 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 ksproxy.ax 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 ksproxy.ax
System Windows 10
File size 229376 bytes
Date 2017-03-18
File details
MD5 2b2582c83102e4d0dd96bd071e67ad6d
SHA1 6928a8730bc31554d63a0dfdd9b74d094e2ce156
SHA256 8845b86161ad5c5c9ca013521d90df0473f590542547eeebcf7c140fcd337ac2
CRC32 a66f386e
Example file location C:\Windows\System32\
Filename ksproxy.ax
System Windows 8.1
File size 245760 bytes
Date 2014-11-21
File details
MD5 cc37821705fd97730ee189821f9f6571
SHA1 9f9c0e15211deb7dee9c82b8e9c4d988bc8287ef
SHA256 f6d6910445aabd6d8e15c2aeb5335f2f4b88354b1843c60da30f4da80493673b
CRC32 9a8855d0
Example file location C:\Windows\System32\
Filename ksproxy.ax
System Windows 8
File size 190464 bytes
Date 2012-07-26
File details
MD5 0026c4f60bf4cac2588d52f5f433afcf
SHA1 f0bc04479f452a51cdacda3902e24d95d3e8c956
SHA256 f44672e2a51a2ca9910371fd90547ff7aa6a8f078ef0e83e9462d4e96f2515d9
CRC32 b37bae66
Example file location 1: C:\Windows\System32\
Filename ksproxy.ax
System Windows 7
File size 250880 bytes
Date 2010-11-21
File details
MD5 2d66f79983f266621e6450e08a536dad
SHA1 67627ebe9dd3639ca82ff375114fcf31e0165dd1
SHA256 24d645ebdbd60698408882b253fca6dfebfa6ee3b83afcbd820b8bd0dc5d4c79
CRC32 aa4cfeed
Example file location C:\Windows\System32\
Filename ksproxy.ax
System Windows 7
File size 193536 bytes
Date -0001-11-30
File details
MD5 c140f86932b5b61f54a4d836e2d34ab2
SHA1 4cde7b249894e98911796c79d0c6b55228998f22
SHA256 94821597ec70f27bf11a747d5eed474c57f389f20a2e0c3f1d0cb3f00974a53b
CRC32 fb0fc0bc
Example file location C:\Windows\System32\
Filename ksproxy.ax
System Windows Vista
File size 187904 bytes
Date 2008-01-21
File details
MD5 1b874247cf769d8f777419041bfc987f
SHA1 843569b8ca1385a5f7f60ce6f626adf5b0458d98
SHA256 7359842e23fa5a913131ff8db6628bada1a7340f0cf5b599898e6be4efa77a22
CRC32 0846dbfb
Example file location ---
Filename ksproxy.ax
System Windows Vista
File size 144384 bytes
Date -0001-11-30
File details
MD5 861797d3c83a6eba05fb2c63b1a45e82
SHA1 17970ef815c0a5a584bfeb9dcf38b8571150a0e5
SHA256 838c814f2e0f545f81164186063e9dee88c64332e44278e95bb0f984435d82ab
CRC32 bcf622a7
Example file location ---
Filename ksproxy.ax
System Windows XP
File size 129536 bytes
Date 2008-04-14
File details
MD5 f1941197a42f9f373cc70042fc82c950
SHA1 e976a95277f46130df513673bc51abd2544fcc0c
SHA256 ca823b1508f97de09ad983cfefa5a145748da82b83eed0650175ac5934a70f31
CRC32 c8fb6dda
Example file location ---