Fix eapphost.dll Errors

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

eapphost.dll file Microsoft EAPHost Peer service. 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 eapphost.dll related errors on your device. You can also download eapphost.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 eapphost.dll
File extension DLL
Description Microsoft EAPHost Peer service
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 eapphost.dll file. eapphost.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 eapphost.dll file. If you encounter one listed below (or similar), please consider the following suggestions.

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



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


Problems related to eapphost.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 eapphost.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.

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

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

Go to the folder where the file should be located and paste the downloaded file. Below is the list of eapphost.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\
  • Windows 7: C:\Windows\System32\
  • Windows Vista: ---
  • Windows Vista: ---
  • Windows XP: ---

If the steps did not solve your eapphost.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 eapphost.dll
System Windows 10
File size 229888 bytes
Date 2017-03-18
File details
MD5 16053f693f8b1a4594a2e3673da90ef4
SHA1 9be10f47d146719dd1633a7254cce8922b05a32c
SHA256 7255b92fb1c16fc2950f774d9d01ad058e0fc96cc61ee26bb3d9c8145720eb89
CRC32 f8f5c032
Example file location C:\Windows\System32\
Filename eapphost.dll
System Windows 8.1
File size 266752 bytes
Date 2014-11-21
File details
MD5 10f616b729db85783d5310cbb1a5f510
SHA1 249900575ce6e6d09e2beac0cd8584287aebe5fb
SHA256 5de0d7707f1e55401a8545f7e33b1d88e94fd3a4490094f8aef4dd3b95c3586e
CRC32 3bc2fbab
Example file location C:\Windows\System32\
Filename eapphost.dll
System Windows 8
File size 238080 bytes
Date 2012-07-26
File details
MD5 034e289fc102ef49e9262107867d3148
SHA1 24f1f4e67091970b6f0e95bf61748e87d45d7bbc
SHA256 92de7d7e336477353e6b26c64315e70353893df8c74e8c7f324d2fb5548b395e
CRC32 b6f032d2
Example file location 1: C:\Windows\System32\
Filename eapphost.dll
System Windows 7
File size 303616 bytes
Date 2010-11-21
File details
MD5 87356377f31da5f20a833811cd59499c
SHA1 fadde01256429f38f0e01bebda33c65296c30ba0
SHA256 4fec1fd3ac4e4e34dcbc0109b248952604f438c84b1604eb9e2359fa721e23c4
CRC32 f57bcd78
Example file location C:\Windows\System32\
Filename eapphost.dll
System Windows 7
File size 222208 bytes
Date -0001-11-30
File details
MD5 9a892b3439884c62b04718f0303a49e9
SHA1 f7aef9d6db05effb2a6648092dfc67c0214451db
SHA256 e3a772832be440b074628fcae06faca451e2329baedd62cab54310b44af6ba4a
CRC32 035c0514
Example file location C:\Windows\System32\
Filename eapphost.dll
System Windows Vista
File size 183808 bytes
Date -0001-11-30
File details
MD5 3ab4023cbd406ac33ab8cdff6c8079a0
SHA1 2acdc99c595b505c819610d65d7eaf25e74040d1
SHA256 beac47a3930e7e0a38540dad16c934a45cd129251c621b1334715cf8fb6073ca
CRC32 7ab2129f
Example file location ---
Filename eapphost.dll
System Windows Vista
File size 261632 bytes
Date 2009-04-11
File details
MD5 e0159ce395b31f746aa26d0a6996db29
SHA1 07374907f9b5babf5d9e9686357fa084101beb3a
SHA256 037b6a753adc314353e5beefd8175fd4cc92e609eb4110684831916089ca65a6
CRC32 16e7ed0e
Example file location ---
Filename eapphost.dll
System Windows XP
File size 180224 bytes
Date 2008-04-14
File details
MD5 0bcb0ebc1b08fa384ec68f253c7253ef
SHA1 eeb5d753e72b553b00f69975dfad0b3701d94cdf
SHA256 dee0484469953d566297e73b374ed0697ea362d0f489e8a6b1433f2114ba8ab4
CRC32 f8c80f56
Example file location ---