AcRedir.dll - How to Fix? Download Now

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

AcRedir.dll file Dynamic Link Library. The file was developed by Microsoft for use with Windows software. Here you will find detailed information about the file and instructions how to proceed in the event of AcRedir.dll related errors on your device. You can also download AcRedir.dll file compatible with Windows Vista, Windows Vista devices which will (most probably) allow you to solve the problem.

For Windows Compatible with: Windows Vista, Windows Vista

File info

General information
Filename AcRedir.dll
File extension DLL
Type Dynamic Link Library
Description Dynamic Link Library
Program Windows Vista
Software Windows
Author Microsoft
Software version Vista
File size 349696
Oldest file 2008-01-21
Latest file 2009-04-11

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

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



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


Problems related to AcRedir.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 AcRedir.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.

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

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

Go to the folder where the file should be located and paste the downloaded file. Below is the list of AcRedir.dll file example directory paths.

  • Windows Vista: C:\Windows\AppPatch\AppPatch64\
  • Windows Vista: C:\Windows\AppPatch\AppPatch64\

If the steps did not solve your AcRedir.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 AcRedir.dll
System Windows Vista
File size 349696 bytes
Date -0001-11-30
File details
MD5 456da3f912015e296c3a4b40caa9d3b4
SHA1 c4553ce509dd3be5fc629308a2acb73b09dc90a0
SHA256 9afee31c6822ae7645a8221e1f11c1be1faeb39be1ed4d122c617971d65c21e4
CRC32 e7003e7c
Example file location C:\Windows\AppPatch\AppPatch64\
Filename AcRedir.dll
System Windows Vista
File size 237568 bytes
Date -0001-11-30
File details
MD5 f4d241169a2635e28732ca51c3adb1ec
SHA1 9b4caf8c10e494d6dcb25ea51f95c5c4ab8e278f
SHA256 3a0ef274498847d52417c965ce9d7b5b6aeba00fe71aed24847e5b662918b646
CRC32 c48a9a36
Example file location C:\Windows\AppPatch\AppPatch64\