apphelp.dll Informations - Download and Fix

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

apphelp.dll file Application Compatibility Client Library. 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 apphelp.dll related errors on your device. You can also download apphelp.dll 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 apphelp.dll
File extension DLL
Description Application Compatibility Client Library
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 apphelp.dll file. apphelp.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 apphelp.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

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



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


Problems related to apphelp.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 apphelp.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.

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

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

Go to the folder where the file should be located and paste the downloaded file. Below is the list of apphelp.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\
  • Windows Vista: ---
  • Windows Vista: ---
  • Windows XP: ---

If the steps did not solve your apphelp.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 apphelp.dll
System Windows 10
File size 584192 bytes
Date 2017-03-18
File details
MD5 1b6853f55be06f631ebe0565562e7717
SHA1 075e93f05034c415cbcc21d50b2d00b263eeb4a8
SHA256 1a7486170dcc7a81b08c27f3fb29899f4eeb20d172275ba38a4b3304e4164211
CRC32 96ab31ed
Example file location C:\Windows\System32\
Filename apphelp.dll
System Windows 8.1
File size 642560 bytes
Date 2014-11-21
File details
MD5 e19419d65d429fff37b2fba2c29f9e5c
SHA1 571c09cdda53037b46c1ebf89ff49a6d1366d0d1
SHA256 8180bca1b2fe49c4baf259dac5d4181e7538d16f6c4095f5fc024d98968653bd
CRC32 893fc206
Example file location C:\Windows\System32\
Filename apphelp.dll
System Windows 8
File size 673792 bytes
Date 2012-07-26
File details
MD5 80592d374aa5e4c6af08c61c2d8453eb
SHA1 1ce19f08e21c239a42b0fddc04155ad038ab0633
SHA256 daf6aa4a055a343738d71f901293b590be4467442212f46e5fed92fb86d6377c
CRC32 746443ee
Example file location 1: C:\Windows\System32\
Filename apphelp.dll
System Windows 7
File size 295936 bytes
Date -0001-11-30
File details
MD5 863f793d15b4026b1a5fdeca873d4d84
SHA1 c14e0a6c61834d559dfc4328c25a7fd90cc515e3
SHA256 af7abd95bb5467551562f129f03c7ac9d52a021f7e547609f40a80e66932c942
CRC32 f3c0bab2
Example file location C:\Windows\SysWOW64\
Filename apphelp.dll
System Windows 7
File size 342016 bytes
Date 2010-11-21
File details
MD5 90499f3163a9f815cf196a205ea3cd5d
SHA1 f97ff54dc4b132756fcf7041e55d645163f19851
SHA256 29b4ed3795cec1177eb367132914ce21c194cdec5db9dc923fd928c85e94d821
CRC32 1c7a35a9
Example file location C:\Windows\SysWOW64\
Filename apphelp.dll
System Windows Vista
File size 171008 bytes
Date -0001-11-30
File details
MD5 1107bd574a84367735fec38b9bd64e6b
SHA1 b8103a8412b3a3eb9e9873d234a265078f7a2ff8
SHA256 682d5372b533817c810f1dcb1c7ae42c44a786ed114601e56df85fe1c41d5989
CRC32 e947bb4a
Example file location ---
Filename apphelp.dll
System Windows Vista
File size 200704 bytes
Date 2009-04-11
File details
MD5 f33e804a031f160d128ab78990de7c91
SHA1 3afedd80913ef4ddaa182f3e9ce59ba60d3108f7
SHA256 243b01a3fc09d0be0fdec26e5d83f31a54384ca58bc768af235c271ed4067fe1
CRC32 7b605f5b
Example file location ---
Filename apphelp.dll
System Windows XP
File size 125952 bytes
Date 2008-04-14
File details
MD5 cf492d7e9af1c628b3536d20ef6f5cc7
SHA1 016ea16586e3c27f4bd43341ba906187a416afe0
SHA256 3d7a5a5d6b804c0a3f3e7256b3ac19397567700271cabcd7c4c8b51565958bc8
CRC32 f9175bfc
Example file location ---