Repair L2SecHC.dll.mui Issues (How to Download and Fix)

Last Updated: 11/27/2023
[Average Read Time: 4.5 minutes]

The development of Microsoft® Windows® Operating System by Microsoft prompted the latest creation of L2SecHC.dll.mui. It is also known as a Layer 2 Security Diagnostics Helper Classes file (file extension MUI), which is classified as a type of Win32 DLL (Dynamic link library) file.

The release of L2SecHC.dll.mui introduced for Windows was on 11/08/2006 in Windows Vista. The most recent release for Windows 10 launched on 07/29/2015 [version 10.0.15063.0 (WinBuild.160101.0800) release]. L2SecHC.dll.mui is included with Windows 10, Windows 8.1, and Windows 8.

This article discusses complete file details, MUI file troubleshooting instructions for problems with L2SecHC.dll.mui, and a comprehensive set of free downloads for every file version that has been catalogued by our team.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	L2SecHC.dll.mui
File Extension:	MUI file extension
Description:	Layer 2 Security Diagnostics Helper Classes
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:	0x0000

View Other L2SecHC.dll.mui Information

File Info	Description
File Size:	55 kB
File Modification Date/Time:	2017:03:18 05:00:32+00:00
File Inode Change Date/Time:	2017:11:05 07:07:54+00:00
File Type:	Win32 DLL
MIME Type:	application/octet-stream
Machine Type:	Intel 386 or later, and compatibles
Time Stamp:	0000:00:00 00:00:00
PE Type:	PE32
Linker Version:	14.10
Code Size:	0
Initialized Data Size:	55808
Uninitialized Data Size:	0
Entry Point:	0x0000
OS Version:	10.0
Image Version:	10.0
Subsystem Version:	6.0
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:	Layer 2 Security Diagnostics Helper Classes
File Version:	10.0.15063.0 (WinBuild.160101.0800)
Internal Name:	L2SecHC.dll
Legal Copyright:	© Microsoft Corporation. All rights reserved.
Original Filename:	L2SecHC.dll.mui
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 L2SecHC.dll.mui Error Messages?

Dynamic Link Library L2SecHC.dll.mui Errors

L2SecHC.dll.mui is considered a type of Dynamic Link Library (DLL) file. Dynamic Link Library files, like L2SecHC.dll.mui, are essentially a "guide book" that stores information and instructions for executable (EXE) files - like sapisvr.exe - to follow. These files were created so that multiple programs (eg. Windows) could share the same L2SecHC.dll.mui 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 MUI 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 L2SecHC.dll.mui is attempted to be loaded either when Windows is starting up, or in some cases already running. Some of the most common L2SecHC.dll.mui errors include:

Access Violation at address - L2SecHC.dll.mui.
L2SecHC.dll.mui could not be found.
Cannot find C:\Windows\System32\en-US\L2SecHC.dll.mui.
Cannot register L2SecHC.dll.mui.
Cannot start Windows. A required component is missing: L2SecHC.dll.mui. Please install Windows again.
Failed to load L2SecHC.dll.mui.
The application has failed to start because L2SecHC.dll.mui was not found.
The file L2SecHC.dll.mui is missing or corrupt.
This application failed to start because L2SecHC.dll.mui was not found. Re-installing the application may fix this problem.

Your L2SecHC.dll.mui 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, L2SecHC.dll.mui file corruption could be caused from a power outage when loading Windows, system crash while loading L2SecHC.dll.mui, 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 L2SecHC.dll.mui 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 L2SecHC.dll.mui 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 L2SecHC.dll.mui error, please proceed to the Step 2 below.

Step 2: Run SFC (System File Checker) to restore the corrupt or missing L2SecHC.dll.mui 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 L2SecHC.dll.mui 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 L2SecHC.dll.mui 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 L2SecHC.dll.mui 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 L2SecHC.dll.mui 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 L2SecHC.dll.mui 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 L2SecHC.dll.mui file version. We maintain a comprehensive database of 100% malware-free L2SecHC.dll.mui 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 L2SecHC.dll.mui 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 Vista: C:\Windows\System32\en-US\
Windows Vista: C:\Windows\SysWOW64\en-US\
Windows 7: C:\Windows\SysWOW64\en-US\
Windows 7: C:\Windows\System32\en-US\
Windows 8: C:\Windows\System32\en-US\
Show 2 more directories +

Windows 8.1: C:\Windows\System32\en-US\
Windows 10: C:\Windows\System32\en-US\

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 L2SecHC.dll.mui 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 L2SecHC.dll.mui Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying L2SecHC.dll.mui to your appropriate Windows system directory. Microsoft typically does not release Windows MUI 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 L2SecHC.dll.mui and all other MUI files for Windows. An incorrectly installed MUI 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

L2SecHC.dll.mui

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:	56320
File Date:	03/18/2017
MD5 Checksum:	68af4ac04f01727ce0d23a9a9e698e33
SHA1 Checksum:	d72954631c6945a8daf29791ebbfc7cd2cff62c8
SHA256 Checksum:	3d6fb55797bc08c2297048904f3c311d9e7502b932e90db17a0dedba5617ffc5
CRC32:
File Directory Location:	C:\Windows\System32\en-US\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	10.0
Initialized Data Size:	55808
Linker Version:	14.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	6.0
File Modification Date/Time:	03/18/2017

Windows Vista

File Name

Software Version

File Version

Architecture

L2SecHC.dll.mui

6.0.6000.16386

6.0.6000.16386 (vista_rtm.061101-2205)

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
Software:	Microsoft® Windows® Operating System
Software Version:	6.0.6000.16386
File Version:	6.0.6000.16386 (vista_rtm.061101-2205)
File Size:	53760
File Date:	11/02/2006
MD5 Checksum:	bd9d084545f3cfcc6832c750322cce86
SHA1 Checksum:	2fc50fe73501107ee8918884e08f20d3d7676e97
SHA256 Checksum:	b5c3bda33bb79c8c219bf63842173ac2af586d020b2f9b64d0d6a5ea355707b2
CRC32:
File Directory Location:	C:\Windows\System32\en-US\

File Version, System, and Machine Information
File Type:	Win64 DLL
Image Version:	6.0
Initialized Data Size:	53248
Linker Version:	8.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows GUI
Subsystem Version:	5.2
File Modification Date/Time:	11/02/2006

L2SecHC.dll.mui

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
File Size:	61440
MD5 Checksum:	8279ac1cb13afbdc1d801cdc69b1b1b1
SHA1 Checksum:	38bc7d952f89dd9e840f2d8de131cae604ffcbbc
SHA256 Checksum:	d1ff47a95868dd6969d0ff33470913224b72a07f497340b9f210de0a40d2caf4
CRC32:
File Directory Location:	C:\Windows\SysWOW64\en-US\

File Version, System, and Machine Information
There is no information available.

Windows 8.1

File Name

Software Version

File Version

Architecture

L2SecHC.dll.mui

6.3.9600.16384

6.3.9600.16384 (winblue_rtm.130821-1623)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8.1
Software:	Microsoft® Windows® Operating System
Software Version:	6.3.9600.16384
File Version:	6.3.9600.16384 (winblue_rtm.130821-1623)
File Size:	55808
File Date:	11/21/2014
MD5 Checksum:	6b5160c980fb2813539d20cd9a66fa38
SHA1 Checksum:	22728ea85a53eda436a062ade5ffe6a13034631a
SHA256 Checksum:	e64d903f3503e417fc92458d657ce7ef1cf4e71ade60c24a9a42bae2696944c4
CRC32:
File Directory Location:	C:\Windows\System32\en-US\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	6.3
Initialized Data Size:	55296
Linker Version:	11.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	6.0
File Modification Date/Time:	11/21/2014

Windows 8

File Name

Software Version

File Version

Architecture

L2SecHC.dll.mui

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:	55808
File Date:	07/26/2012
MD5 Checksum:	0f68df3f75435066da48a3e84ef12c2f
SHA1 Checksum:	3f57e399ca4c116f53888a3bc6b5918b5b0a42de
SHA256 Checksum:	c39e62fd58894d8a745bc3b4107665670a4e0e9a737dcb2cbb5beae088891865
CRC32:
File Directory Location:	C:\Windows\System32\en-US\

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	6.2
Initialized Data Size:	55296
Linker Version:	10.10
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Windows GUI
Subsystem Version:	5.1
File Modification Date/Time:	07/26/2012

Windows 7

File Name

Software Version

File Version

Architecture

L2SecHC.dll.mui

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 7
File Size:	55808
MD5 Checksum:	c98757e5054d706981ea292772a72015
SHA1 Checksum:	6526e1cea32ee6ee5228da8db5dfec410878e896
SHA256 Checksum:	028d4d03fdc47edce8b1a8703c7ad29b58f54164ae59d91ec61b10c136027d37
CRC32:
File Directory Location:	C:\Windows\SysWOW64\en-US\

File Version, System, and Machine Information
There is no information available.

L2SecHC.dll.mui

6.1.7600.16385

6.1.7600.16385 (win7_rtm.090713-1255)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 7
Software:	Microsoft® Windows® Operating System
Software Version:	6.1.7600.16385
File Version:	6.1.7600.16385 (win7_rtm.090713-1255)
File Size:	55808
File Date:	04/12/2011
MD5 Checksum:	93e393d8e1b3e50f959add2e629e6742
SHA1 Checksum:	314b15d15236a05f7d0005cb6f7e143fa7cca611
SHA256 Checksum:	84efcd3654738ac99d3b9036ae10f78dc0eaf5ea69e5ef556e94b2f0dc935ce7
CRC32:
File Directory Location:	C:\Windows\System32\en-US\

File Version, System, and Machine Information
File Type:	Win64 DLL
Image Version:	6.1
Initialized Data Size:	55296
Linker Version:	9.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Windows GUI
Subsystem Version:	5.2
File Modification Date/Time:	04/12/2011

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Files Related to L2SecHC.dll.mui

MUI Files Related to L2SecHC.dll.mui

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
feclient.dll.mui	Myriad User Instrument	Windows Vista	17920	C:\Users\Tester\AppData\Local\Packages\Microsof...
DWWIN.exe.mui	Windows Error Reporting	Microsoft® Windows® Operating System (10.0.15063.0)	6144	C:\Windows\Logs\DPX\
MsiProvider.dll.mui	DISM Msi Provider	Microsoft® Windows® Operating System (6.2.9200.16384)	15360	C:\Windows\Panther\UnattendGC\
mciqtz32.dll.mui	DirectShow MCI Driver	Microsoft® Windows® Operating System (10.0.15063.0)	3584	C:\WINDOWS\Tasks\
mlang.dll.mui	Myriad User Instrument	Windows 7	17408	C:\$WINDOWS.~BT\Sources\Boot\PXE\nl-NL\

Other Files Related to L2SecHC.dll.mui

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
OneX_v1.xsd	XML Schema Definition	Windows 8	5957	C:\Windows\L2Schemas\
OneX_v1.xsd	XML Schema Definition	Windows 10	5957	C:\Windows\L2Schemas\
WWAN_profile_v1.xsd	XML Schema Definition	Windows 7	6201	C:\Windows\L2Schemas\
WWAN_profile_v1.xsd	XML Schema Definition	Microsoft Office Access 2010 14	6201	C:\Windows\Temp\527D94AF-D053-4381-B105-0D815D5...
WLANAP_profile_v1.xsd	XML Schema Definition	Windows 8.1	7548	C:\Windows\L2Schemas\

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