Microsoft Windows DLL AuthExt.dll

Download AuthExt.dll and Fix DLL Errors

Last Updated: 11/26/2024
[Average Article Time to Read: 4.7 minutes]

AuthExt.dll uses the DLL file extension, which is more specifically known as a Authentication Extensions file. It is classified as a Win32 DLL (Dynamic link library) file, created for Microsoft® Windows® Operating System by Microsoft.

The first version of AuthExt.dll for Windows 8 was introduced on 08/01/2012 in Windows 8. The most recent version [file version 10.0.15063.0 (WinBuild.160101.0800)] was introduced on 07/29/2015 for Windows 10. AuthExt.dll is included in Windows 10, Windows 8.1, and Windows 8.

Please see below for more detailed information, DLL file troubleshooting instructions, and free downloads of different versions of AuthExt.dll.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	AuthExt.dll
File Extension:	DLL file extension
Description:	Authentication Extensions
Object File Type:	Dynamic link library
File Operating System:	Windows NT 32-bit
MIME Type:	application/octet-stream
User Popularity Rating:

Developer and Software Information
Software Developer:	Microsoft Corporation
Software Program:	Microsoft® Windows® Operating System
Legal Copyright:	© Microsoft Corporation. All rights reserved.

File Details
Character Set:	Unicode
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x003f
Entry Point:	0x5760
Code Size:	39936

View Other AuthExt.dll Information

File Info	Description
File Size:	52 kB
File Modification Date/Time:	2017:03:18 18:19:23+00:00
File Inode Change Date/Time:	2017:11:05 07:07:54+00:00
File Type:	Win32 DLL
MIME Type:	application/octet-stream
Warning:	Possibly corrupt Version resource
Machine Type:	Intel 386 or later, and compatibles
Time Stamp:	2063:12:08 15:56:18+00:00
PE Type:	PE32
Linker Version:	14.10
Code Size:	39936
Initialized Data Size:	12800
Uninitialized Data Size:	0
Entry Point:	0x5760
OS Version:	10.0
Image Version:	10.0
Subsystem Version:	10.0
Subsystem:	Windows GUI
File Version Number:	10.0.15063.0
Product Version Number:	10.0.15063.0
File Flags Mask:	0x003f
File Flags:	(none)
File OS:	Windows NT 32-bit
Object File Type:	Dynamic link library
File Subtype:	0
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	Microsoft Corporation
File Description:	Authentication Extensions
File Version:	10.0.15063.0 (WinBuild.160101.0800)
Internal Name:	AuthExt
Legal Copyright:	© Microsoft Corporation. All rights reserved.
Original Filename:	AuthExt.dll
Product Name:	Microsoft® Windows® Operating System
Product Version:	10.0.15063.0

^✻ Portions of file data provided by Exiftool (Phil Harvey) distributed under the Perl Artistic License.

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What are AuthExt.dll Error Messages?

Dynamic Link Library AuthExt.dll Errors

AuthExt.dll is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like AuthExt.dll, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like 3DViewer.ResourceResolver.exe - to follow. These files were created so that multiple programs (eg. Windows) could share the same AuthExt.dll file, saving valuable memory allocation, therefore making your computer run more efficiently.

Unfortunately, what makes DLL files so convenient and efficient, also makes them extremely vulnerable to problems. If something happens to a shared DLL file, either it goes missing or gets corrupted in some way, it can generate a "runtime" error message. Runtime is pretty self-explanatory; it means that these errors are triggered when AuthExt.dll is attempted to be loaded either when Windows is starting up, or in some cases already running. Some of the most common AuthExt.dll errors include:

Access Violation at address - AuthExt.dll.
AuthExt.dll could not be found.
Cannot find C:\Windows\System32\AuthExt.dll.
Cannot register AuthExt.dll.
Cannot start Windows. A required component is missing: AuthExt.dll. Please install Windows again.
Failed to load AuthExt.dll.
The application has failed to start because AuthExt.dll was not found.
The file AuthExt.dll is missing or corrupt.
This application failed to start because AuthExt.dll was not found. Re-installing the application may fix this problem.

Your AuthExt.dll file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with Windows), or deleted by a malware infection. Furthermore, AuthExt.dll file corruption could be caused from a power outage when loading Windows, system crash while loading AuthExt.dll, bad sectors on your storage media (usually your primary hard drive), or quite commonly, a malware infection. Thus, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

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How to Fix AuthExt.dll Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your AuthExt.dll issue. These troubleshooting steps are listed in the recommended order of execution.

Step 1: Restore your PC back to the latest restore point, "snapshot", or backup image before error occurred.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
When you see the search box, type "System Restore" and press "ENTER".
In the search results, find and click System Restore.
Please enter the administrator password (if applicable / prompted).
Follow the steps in the System Restore Wizard to choose a relevant restore point.
Restore your computer to that backup image.

If the Step 1 fails to resolve the AuthExt.dll error, please proceed to the Step 2 below.

Step 2: Run SFC (System File Checker) to restore the corrupt or missing AuthExt.dll file.

System File Checker is a utility included with every Windows version that allows you scan and restore corrupted system files. Use the SFC tool to fix missing or corrupt AuthExt.dll files (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
In the search box, type "cmd" but DO NOT PRESS "ENTER".
Press and hold "CTRL-Shift" on your keyboard while pressing "ENTER".
You'll be prompted with a permission dialog box.
In the box, click "YES".
You should have a black screen with a blinking cursor.
In that black screen, type "sfc /scannow" and hit "ENTER".
SFC will begin scanning for AuthExt.dll issues and any other system file problems.
Follow any on-screen commands to complete the process.

Please be aware that this scan might take a while, so please be patient while it is working.

If this Step 2 fails as well, please proceed to the Step 3 below.

sfc /scannow

Step 3: Perform a Windows Update.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many AuthExt.dll error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

Hit the Windows Start button
In the search box, type "Update" and press "ENTER".
In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
If updates are available for download, click "Install Updates".
After the update is completed, restart your PC.

If Windows Update failed to resolve the AuthExt.dll error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

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If Those Steps Fail: Download and Replace Your AuthExt.dll File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate AuthExt.dll file version. We maintain a comprehensive database of 100% malware-free AuthExt.dll files for every applicable version of Windows. Please follow the steps below to download and properly replace you file:

Locate your Windows operating system version in the list of below "Download AuthExt.dll Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy the file into the appropriate directory for your Windows version:

Windows 8: C:\Windows\System32\
Windows 8.1: C:\Windows\System32\
Windows 10: C:\Windows\System32\

Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.

GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve AuthExt.dll problems. To avoid data loss, you must be sure that you have backed-up all of your important documents, pictures, software installers, and other personal data before beginning the process. If you are not currently backing up your data, you need to do so immediately.

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Download AuthExt.dll Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying AuthExt.dll to your appropriate Windows system directory. Microsoft typically does not release Windows DLL files for download because they are bundled together inside of a software installer. The installer's task is to ensure that all correct verifications have been made before installing and placing AuthExt.dll and all other DLL files for Windows. An incorrectly installed DLL file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

Windows 10

File Name

Software Version

File Version

Architecture

AuthExt.dll

10.0.15063.0

10.0.15063.0 (WinBuild.160101.0800)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Microsoft® Windows® Operating System
Software Version:	10.0.15063.0
File Version:	10.0.15063.0 (WinBuild.160101.0800)
File Size:	52736
File Date:	03/18/2017
MD5 Checksum:	ee5a76cc4abc8a5f51939ac2e67cc6bd
SHA1 Checksum:	56ca3c325b765f0a32929acd08fdcaebab3f50ed
SHA256 Checksum:	2ae34c035ff2285627ef36f78935a3124b6b6c4276c65aab5d0623814ef1be94
CRC32:
File Directory Location:	C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	10.0
Initialized Data Size:	12800
Linker Version:	14.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	10.0
File Modification Date/Time:	03/18/2017

Windows 8.1

File Name

Software Version

File Version

Architecture

AuthExt.dll

6.3.9600.17415

6.3.9600.17415 (winblue_r4.141028-1500)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8.1
Software:	Microsoft® Windows® Operating System
Software Version:	6.3.9600.17415
File Version:	6.3.9600.17415 (winblue_r4.141028-1500)
File Size:	31232
File Date:	11/21/2014
MD5 Checksum:	9e2d86747b843e887529655ffe40b900
SHA1 Checksum:	5d9e6fae1a68a0c224578a91083e276d75b43173
SHA256 Checksum:	3015795025248935cd299f0bbd5f892b8e6d3c483745adde648ddaf7972f97b1
CRC32:
File Directory Location:	C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	6.3
Initialized Data Size:	9216
Linker Version:	11.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	6.3
File Modification Date/Time:	11/21/2014

Windows 8

File Name

Software Version

File Version

Architecture

AuthExt.dll

6.2.9200.16384

6.2.9200.16384 (win8_rtm.120725-1247)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8
Software:	Microsoft® Windows® Operating System
Software Version:	6.2.9200.16384
File Version:	6.2.9200.16384 (win8_rtm.120725-1247)
File Size:	27136
File Date:	07/26/2012
MD5 Checksum:	ef7701010381d1468703544ff5b48992
SHA1 Checksum:	f591c507ebb168092349145dee02c8e4c1d6bf7f
SHA256 Checksum:	9cec24e2164ac6eef74b56d0d12592ec6cef73ba87880498d881d9ab42c2b130
CRC32:
File Directory Location:	C:\Windows\System32\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	6.2
Initialized Data Size:	9216
Linker Version:	10.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	6.2
File Modification Date/Time:	07/26/2012

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Files Related to AuthExt.dll

DLL Files Related to AuthExt.dll

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
WofUtil.dll	Windows Overlay File System Filter user mode API	Microsoft® Windows® Operating System (6.3.9600.17415)	15360	C:\Windows\System32\en-US\
IMEAPIS.DLL	Microsoft IME	Microsoft® Windows® Operating System (10.1.7600.16385)	68608	C:\$WINDOWS.~BT\Sources\Boot\EFI\pt-PT\
System.Data.DataSetExt...	Dynamic Link Library	Windows 10	71952	C:\Windows\System32\DriverStore\FileRepository\...
wshqos.dll	Dynamic Link Library	Windows 7	13824	C:\WINDOWS\Tasks\
sppobjs.dll	Software Protection Platform Plugins	Microsoft® Windows® Operating System (6.3.9600.17031)	1129064	C:\$WINDOWS.~BT\Sources\Boot\EFI\sl-SI\

Other Files Related to AuthExt.dll

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
OneX_v1.xsd	XML Schema Definition	Windows XP	5957	C:\Windows\L2Schemas\
WLANAP_profile_v1.xsd	XML Schema Definition	Windows 7	7504	C:\Windows\L2Schemas\
WLANAP_profile_v1.xsd	XML Schema Definition	Windows 8.1	7548	C:\Windows\L2Schemas\
WLAN_policy_v1.xsd	XML Schema Definition	Windows 8	7627	C:\Windows\L2Schemas\
p2057.ngr	NEPLAN Graphic Data	Windows Vista	3188068	C:\Windows\Speech\Engines\SR\en-GB\

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