Download and Fix acproxy.dll

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

acproxy.dll file Autochk Proxy 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 acproxy.dll related errors on your device. You can also download acproxy.dll file compatible with Windows 10, Windows 8.1, Windows 8, 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

File info

General information
Filename acproxy.dll
File extension DLL
Description Autochk Proxy 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 acproxy.dll file. acproxy.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 acproxy.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

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



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


Problems related to acproxy.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 acproxy.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.

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

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

Go to the folder where the file should be located and paste the downloaded file. Below is the list of acproxy.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\

If the steps did not solve your acproxy.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 acproxy.dll
System Windows 10
File size 10752 bytes
Date 2017-03-18
File details
MD5 645d67a260471d21e724683885377a1b
SHA1 c3bc450022937e447dce1ba8874973c6d14dbd8f
SHA256 75074667145d554a064b5179230202777045bdf34b0c459b6bfbfb6a7290cb04
CRC32 38e4bb42
Example file location C:\Windows\System32\
Filename acproxy.dll
System Windows 8.1
File size 10240 bytes
Date 2014-11-21
File details
MD5 616fbd8131507a360b6344aaac1b0ad5
SHA1 3158793568434c3541a07818ddb5f49cb6f35952
SHA256 a2c16adab0c1a44faa234cdb39014c5a7d3971edef6aad17ccf9490e446ce295
CRC32 421a99d0
Example file location C:\Windows\System32\
Filename acproxy.dll
System Windows 8
File size 10240 bytes
Date 2012-07-26
File details
MD5 1ab3294044fca4efabc2c18737076140
SHA1 1ca227c79cbd625a75d2ab708aca4d60283be640
SHA256 b0b5ca22102794e4b9d9396df6da9f32c73cb4d6d20fb84c46fa3d49824725bf
CRC32 76248682
Example file location 1: C:\Windows\System32\
Filename acproxy.dll
System Windows 7
File size 11264 bytes
Date 2009-07-14
File details
MD5 aeafe966fb0bef2f9153b7076bc79127
SHA1 9c02a150d2a4955e28ddc0f29ff1319bff82536c
SHA256 300e75838034111928c5062c130dcb245c450b459607afda506714d9c5e84b6c
CRC32 d5015990
Example file location C:\Windows\System32\