How to Download and Repair VSTCNXT3.SYS (3 Step Guide)

Last Updated: 12/02/2024
[Average Read Time: 4.5 minutes]

VSTCNXT3.SYS, also known as a HSF_CNXT driver file, was created by Microsoft for the development of SoftK56 Modem Driver. SYS files fall under under the Win32 EXE (Driver) file type category.

The first version of VSTCNXT3.SYS for Windows 8 was introduced on 08/01/2012 in Windows 8. The latest file update released for Windows 10 was on 07/29/2015 [file version 7.80.2.0 built by: WinDDK]. VSTCNXT3.SYS is packaged with Windows 10, Windows 8.1, and Windows 8.

In this article, you will find detailed VSTCNXT3.SYS information, a SYS file troubleshooting guide, and a list of versions that are available for free download.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	VSTCNXT3.SYS
File Extension:	SYS file extension
Description:	HSF_CNXT driver
Object File Type:	Driver
File Operating System:	Windows NT 32-bit
MIME Type:	application/octet-stream
User Popularity Rating:

Developer and Software Information
Software Developer:	Conexant Systems, Inc.
Software Program:	SoftK56 Modem Driver
Legal Copyright:	Copyright Conexant Systems, Inc. 2008

File Details
Character Set:	Unicode
Language Code:	Neutral
File Flags:	(none)
File Flags Mask:	0x003f
Entry Point:	0xa7183
Code Size:	576000

View Other VSTCNXT3.SYS Information

File Info	Description
File Size:	646 kB
File Modification Date/Time:	2012:06:02 14:33:56+00:00
File Inode Change Date/Time:	2017:11:05 07:01:44+00:00
File Type:	Win32 EXE
MIME Type:	application/octet-stream
Machine Type:	Intel 386 or later, and compatibles
Time Stamp:	2008:10:16 00:29:13+00:00
PE Type:	PE32
Linker Version:	8.0
Code Size:	576000
Initialized Data Size:	143360
Uninitialized Data Size:	0
Entry Point:	0xa7183
OS Version:	6.0
Image Version:	6.0
Subsystem Version:	6.0
Subsystem:	Native
File Version Number:	7.80.2.0
Product Version Number:	7.80.2.0
File Flags Mask:	0x003f
File Flags:	(none)
File OS:	Windows NT 32-bit
Object File Type:	Driver
File Subtype:	7
Language Code:	Neutral
Character Set:	Unicode
Company Name:	Conexant Systems, Inc.
File Description:	HSF_CNXT driver
File Version:	7.80.2.0 built by: WinDDK
Internal Name:	HSF_CNXT.sys
Legal Copyright:	Copyright Conexant Systems, Inc. 2008
Original Filename:	HSF_CNXT.sys
Product Name:	SoftK56 Modem Driver
Product Version:	7.80.2.0

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

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What are VSTCNXT3.SYS Error Messages?

VSTCNXT3.SYS Blue Screen of Death (BSOD) Errors

There are a number of reasons why you could be encountering issues with VSTCNXT3.SYS. Most of the issues concerning sys files involve Blue Screen of Death (BSOD) errors. These types of VSTCNXT3.SYS errors can be cause by hardware problems, outdated firmware, corrupt drivers, or other software-related (eg. Windows update) issues. Some of these errors include:

VSTCNXT3.SYS could not be found.
VSTCNXT3.SYS failed to load.
The file VSTCNXT3.SYS is missing or corrupt.
Windows failed to start - VSTCNXT3.SYS.

A problem has been detected and Windows has been shut down to prevent damage to your computer. The problem seems to be caused by the following file: VSTCNXT3.SYS.

:( Your PC ran into a problem that it couldn't handle, and now needs to restart. You can search for the error online: [BSOD] (VSTCNXT3.SYS).

STOP 0×0000007A: KERNEL DATA INPAGE (VSTCNXT3.SYS) STOP 0x0000000A: IRQL NOT LESS EQUAL (VSTCNXT3.SYS) STOP 0x0000003B: SYSTEM SERVICE EXCEPTION (VSTCNXT3.SYS) STOP 0x0000001E: KMODE EXCEPTION NOT HANDLED (VSTCNXT3.SYS) STOP 0x00000050: PAGE FAULT IN A NONPAGED AREA (VSTCNXT3.SYS) STOP 0x0000007E: SYSTEM THREAD EXCEPTION NOT HANDLED (VSTCNXT3.SYS)

It's Critical to Resolve Blue Screen of Death Errors

In the majority of cases, you will encounter VSTCNXT3.SYS BSOD errors after you've installed new hardware, software (Windows), or performed a failed Windows Update. In other cases, software corruption caused by a malware infection can lead to VSTCNXT3.SYS Blue Screen of Death errors. Therefore, it's critical to make sure your anti-virus is kept up-to-date and scanning regularly.

GEEK TIP : As a rule of thumb, it's always a good idea to create a Windows "Snapshot" backup / System Restore Point before making any hardware or software changes to your computer. That way, it's very easy to restore your system in the unfortunate event you encounter a VSTCNXT3.SYS Blue Screen of Death error after recent changes.

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How to Fix VSTCNXT3.SYS 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 VSTCNXT3.SYS 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 VSTCNXT3.SYS error, please proceed to the Step 2 below.

Step 2: Run SFC (System File Checker) to restore the corrupt or missing VSTCNXT3.SYS 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 VSTCNXT3.SYS 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 VSTCNXT3.SYS 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 VSTCNXT3.SYS 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 VSTCNXT3.SYS 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 VSTCNXT3.SYS 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 VSTCNXT3.SYS file version. We maintain a comprehensive database of 100% malware-free VSTCNXT3.SYS 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 VSTCNXT3.SYS 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\DriverStore\FileRepository\mdmcxav3.inf_x86_3c9275be906b01dd\
Windows 8: C:\Windows\System32\DriverStore\FileRepository\mdmcxhv3.inf_x86_15b13e9a734fb085\
Windows 8: C:\Windows\System32\DriverStore\FileRepository\mdmcxpv3.inf_x86_fb18b60a7ae25b18\
Windows 8.1: C:\Windows\System32\DriverStore\FileRepository\mdmcxav3.inf_x86_3c9275be906b01dd\
Windows 8.1: C:\Windows\System32\DriverStore\FileRepository\mdmcxhv3.inf_x86_15b13e9a734fb085\
Show 4 more directories +

Windows 8.1: C:\Windows\System32\DriverStore\FileRepository\mdmcxpv3.inf_x86_fb18b60a7ae25b18\
Windows 10: C:\Windows\System32\DriverStore\FileRepository\mdmcxav3.inf_x86_cc22ad3e6a4dba93\
Windows 10: C:\Windows\System32\DriverStore\FileRepository\mdmcxhv3.inf_x86_8531f8bfcd510af5\
Windows 10: C:\Windows\System32\DriverStore\FileRepository\mdmcxpv3.inf_x86_cb4232b1afb2dcef\

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 VSTCNXT3.SYS 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 VSTCNXT3.SYS Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying VSTCNXT3.SYS to your appropriate Windows system directory. Microsoft typically does not release Windows SYS 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 VSTCNXT3.SYS and all other SYS files for Windows. An incorrectly installed SYS 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

VSTCNXT3.SYS

7.80.2.0

7.80.2.0 built by: WinDDK

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	SoftK56 Modem Driver
Software Version:	7.80.2.0
File Version:	7.80.2.0 built by: WinDDK
File Size:	661504
File Date:	06/02/2012
MD5 Checksum:	bc0c7ea89194c299f051c24119000e17
SHA1 Checksum:	8b39389ba3dd146009b92ed4fe2cc8825d5c665c
SHA256 Checksum:	f5fb21f7ad7370f3d5df7c23f33118ecf19865b995af12e9a8a8d893e7e6264f
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ... C:\Windows\System32\DriverStore\FileRepository ... C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win32 EXE
Image Version:	6.0
Initialized Data Size:	143360
Linker Version:	8.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	6.0
File Modification Date/Time:	06/02/2012

Windows 8.1

File Name

Software Version

File Version

Architecture

VSTCNXT3.SYS

7.80.2.0

7.80.2.0 built by: WinDDK

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8.1
Software:	SoftK56 Modem Driver
Software Version:	7.80.2.0
File Version:	7.80.2.0 built by: WinDDK
File Size:	661504
File Date:	06/02/2012
MD5 Checksum:	bc0c7ea89194c299f051c24119000e17
SHA1 Checksum:	8b39389ba3dd146009b92ed4fe2cc8825d5c665c
SHA256 Checksum:	f5fb21f7ad7370f3d5df7c23f33118ecf19865b995af12e9a8a8d893e7e6264f
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ... C:\Windows\System32\DriverStore\FileRepository ... C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win32 EXE
Image Version:	6.0
Initialized Data Size:	143360
Linker Version:	8.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	6.0
File Modification Date/Time:	06/02/2012

Windows 8

File Name

Software Version

File Version

Architecture

VSTCNXT3.SYS

7.80.2.0

7.80.2.0 built by: WinDDK

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 8
Software:	SoftK56 Modem Driver
Software Version:	7.80.2.0
File Version:	7.80.2.0 built by: WinDDK
File Size:	661504
File Date:	06/02/2012
MD5 Checksum:	bc0c7ea89194c299f051c24119000e17
SHA1 Checksum:	8b39389ba3dd146009b92ed4fe2cc8825d5c665c
SHA256 Checksum:	f5fb21f7ad7370f3d5df7c23f33118ecf19865b995af12e9a8a8d893e7e6264f
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ... C:\Windows\System32\DriverStore\FileRepository ... C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win32 EXE
Image Version:	6.0
Initialized Data Size:	143360
Linker Version:	8.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	6.0
File Modification Date/Time:	06/02/2012

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Files Related to VSTCNXT3.SYS

SYS Files Related to VSTCNXT3.SYS

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
battc.sys	Battery Class Driver	Microsoft® Windows® Operating System (6.2.9200.16384)	30448	C:\Windows\Fonts\
examc.sys	Windows System Configuration	Windows Vista	14848	C:\Windows\Boot\PCAT\pt-BR\
win32k.sys	Multi-User Win32 Driver	Microsoft® Windows® Operating System (6.3.9600.17393)	3558400	C:\Windows\Logs\DPX\
VSTBS23.SYS	HSF_HWB2 WDM driver	SoftK56 Modem Driver (7.80.2.0)	266752	C:\Windows\System32\LogFiles\WMI\RtBackup\
mouclass.sys	Mouse Class Driver	Microsoft® Windows® Operating System (6.2.9200.16384)	39152	C:\Windows\Temp\

Other Files Related to VSTCNXT3.SYS

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
OneX_v1.xsd	XML Schema Definition	Windows 7	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\
WLAN_profile_v1.xsd	XML Schema Definition	Windows 8.1	16142	C:\Windows\L2Schemas\

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