Troubleshoot alg.exe Errors and Download File

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

alg.exe file Application Layer Gateway 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 alg.exe related errors on your device. You can also download alg.exe file compatible with Windows 10, Windows 8.1, Windows 8, Windows 7, 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 Vista, Windows XP

File info

General information
Filename alg.exe
File extension EXE
Description Application Layer Gateway 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 alg.exe file. alg.exe 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 alg.exe file. If you encounter one listed below (or similar), please consider the following suggestions.

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



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


Problems related to alg.exe 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 alg.exe 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.

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

The last solution is to manually download and replace alg.exe 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 alg.exe file.

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

If the steps did not solve your alg.exe 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 alg.exe
System Windows 10
File size 73216 bytes
Date 2017-03-18
File details
MD5 f9a9bb69875bb4bbdb7add152145b15c
SHA1 c179cdf691d90ff9322f4c8564797413d68c80cb
SHA256 c4ee9471377a1b8d300fff2600b85cb6ee2ef19603deafae4d3f9efe6287283c
CRC32 13f83747
Example file location C:\Windows\System32\
Filename alg.exe
System Windows 8.1
File size 74752 bytes
Date 2014-11-21
File details
MD5 0af4d02bff152c2e9700e5e2990814a0
SHA1 61979f0d69b8d02a875c9fcb382bf5d8c9e99e5d
SHA256 e6e6480547808422c94bc31bfbd56d1322e304bf261591fbf45f7cc3b958648d
CRC32 2cf9c798
Example file location C:\Windows\System32\
Filename alg.exe
System Windows 8
File size 71168 bytes
Date 2012-07-26
File details
MD5 b5a707e902be5fc9b93c389fba6edf9c
SHA1 93b0eb4614bc45a0705e8f642b2fca0513951c5d
SHA256 3274d0fc8b3cc0c27ebe3d1e7aa31bf261f265fa31b0ef767f15289e2843a1d6
CRC32 175f1685
Example file location 1: C:\Windows\System32\
Filename alg.exe
System Windows 7
File size 79360 bytes
Date 2009-07-14
File details
MD5 3290d6946b5e30e70414990574883ddb
SHA1 be0144e3235ffde0787e9f1cd34c828ec87d8e19
SHA256 0e9294e1991572256b3cda6b031db9f39ca601385515ee59f1f601725b889663
CRC32 60d9dd5a
Example file location C:\Windows\System32\
Filename alg.exe
System Windows Vista
File size 80896 bytes
Date 2008-01-21
File details
MD5 5922f4f59b7868f3d74bbbbeb7b825a3
SHA1 dbea2454175f095f272441bcca4cf77cea304942
SHA256 71504bc8b596f540bf059059670bc0c138d8759c1dd9f99f1ec368fd5c53f573
CRC32 8c9c9284
Example file location C:\Windows\System32\
Filename alg.exe
System Windows XP
File size 44544 bytes
Date 2008-04-14
File details
MD5 8c515081584a38aa007909cd02020b3d
SHA1 ef5728c819f466bfe56c36bc9db3fac004ef3d50
SHA256 a5e13ca10f702928e0de84c74d0ea8accb117fd76fbabc55220c75c4ffd596dc
CRC32 5f315955
Example file location ---