How to Repair afd.sys? Download Now

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

afd.sys file Ancillary Function Driver for WinSock. 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 afd.sys related errors on your device. You can also download afd.sys 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.

Compatible with: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista, Windows XP

User popularity

3.1 Scanning for malicious software
3.2 System and driver update
3.3 System File Checker tool
3.4 System recovery

4 Download afd.sys

4.1 List of afd.sys file versions

File info

General information
Filename	afd.sys
File extension	SYS
Description	Ancillary Function Driver for WinSock

Software
Program	Microsoft® Windows® Operating System
Author	Microsoft Corporation

Details
MIME type	application/octet-stream
File type	Driver
System	Windows NT 32-bit
Copyrights	© Microsoft Corporation. All rights reserved.
Character set	Unicode
Language cod	English (U.S.)

Most common afd.sys file related problems

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

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

afd.sys

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

Problems related to afd.sys 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 afd.sys 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.

How to fix afd.sys errors in just few steps?

Remember, before taking any action related to system files perform a backup copy of your data!

afd.sys 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

Windows files are commonly attacked by malicious software that prevents them from working properly. First step in addressing problems with afd.sys 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.

Installing relevant Microsoft Windows patches and updates may solve your problems related to afd.sys file. Use dedicated Windows tool to perform the update.

Go to the Windows "Start" menu
Type "Windows Update" in the search field
Choose the appropriate software program (name may vary depending on your system version)
Check if your system is up to date. If any unapplied updates are listed, install them immediately.
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 afd.sys 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 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 afd.sys file. After an error related to%fileextension% file has been discovered, the program attempts to automatically replace the afd.sys file with properly working version. To use the tool:

Go to the Windows "Start" menu
Type "cmd" in the search field
Locate "Command Prompt" result – don't run it yet:
Click the right mouse button and select "Run as Administrator" option
Type "sfc /scannow" in console prompt to start the program and follow the instructions

Step 4: Restoring Windows system

Another approach is to restore system to previous state, before the afd.sys file error occured. In order to restore your system, follow the instructions below

Go to the Windows "Start" menu
Type "System Restore" in the search field
Start the system restore tool – it's name may differ depending on version of the system
The application will guide you through the process – read the messages carefully
After the process has finished, restart your computer.

If all the above-mentioned methods failed and the afd.sys 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 afd.sys file

The last solution is to manually download and replace afd.sys 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 afd.sys file.

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

Windows 10: C:\Windows\System32\drivers\
Windows 8.1: C:\Windows\System32\drivers\
Windows 8: 1: C:\Windows\System32\drivers\
Windows 7: C:\Windows\System32\drivers\
Windows Vista: C:\Windows\System32\drivers\
Windows XP: ---

If the steps did not solve your afd.sys 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 afd.sys

System Windows 10

File size 498592 bytes

Date 2017-03-18

Download

File details
	MD5	b037d7b6b597a1d72086e56797a7ae34
	SHA1	36c4a552c62fac3bdbf20a15dccea179505d8d4c
	SHA256	a1baf91a765445850b7eb714cf45a2baf519938359efc6b0dc5c3add7987de21
	CRC32	773ad375
	Example file location	C:\Windows\System32\drivers\

Filename afd.sys

System Windows 8.1

File size 461312 bytes

Date 2014-11-21

Download

File details
	MD5	d75fb05e8dbf21fa0ef313c7503243f1
	SHA1	85afe72d3fff8f8d920e5d975b9e2a35c586fb00
	SHA256	a9d9b5a6b26d114319b16605d47bdd27d4b13b72d2661dddcd711ac48d46db4e
	CRC32	975895fe
	Example file location	C:\Windows\System32\drivers\

Filename afd.sys

System Windows 8

File size 438272 bytes

Date 2012-07-26

Download

File details
	MD5	6043c72306d5c7b8bc823a1cc49f53b8
	SHA1	c624ec8b6b16767dd8bac5b55dcf2c5d0641553c
	SHA256	473e27328ae8d4c74a1762ea94e295f55e8edbddc1585d013e0fe4099b322fa3
	CRC32	453384d1
	Example file location	1: C:\Windows\System32\drivers\

Filename afd.sys

System Windows 7

File size 499712 bytes

Date 2010-11-21

Download

File details
	MD5	d31dc7a16dea4a9baf179f3d6fbdb38c
	SHA1	4a1af63c95b801797f13b540a83b2bf86640fe77
	SHA256	532678d86e3e667f2e789c4873565e0b92c549a93f10802bb6d5b505ca3238ce
	CRC32	4c615a0b
	Example file location	C:\Windows\System32\drivers\

Filename afd.sys

System Windows Vista

File size 406016 bytes

Date 2009-04-11

Download

File details
	MD5	12415ccfd3e7cec55b5184e67b039fe4
	SHA1	e57156d59a9078744f4484ec2f40478b2339bae8
	SHA256	0cf2f60c60ab5f5977d9d1015041fbb51bf8db1bb14b74ad3f7c16fa61eed51b
	CRC32	1386da77
	Example file location	C:\Windows\System32\drivers\

Filename afd.sys

System Windows XP

File size 138112 bytes

Date 2008-04-14

Download

File details
	MD5	322d0e36693d6e24a2398bee62a268cd
	SHA1	4a6bbaa8b5b1ba2e1c9c90a4a5de83d0cb6da4f7
	SHA256	fb0bff5846e50dbcc2826639318a6a1de79ee7dea2719ed74a5f6f44454e13d0
	CRC32	c7609ba8
	Example file location	---