Microsoft Windows SYS ql40xx.sys

Repair Ql40xx.sys Issues (How to Download and Fix)

Last Updated: 11/26/2024
[Reading Time Required: 3.5 minutes]

The development of QLA40XX iSCSI Host Bus Adapter by Microsoft prompted the latest creation of ql40xx.sys. It is also known as a QLogic iSCSI Storport Miniport Driver file (file extension SYS), which is classified as a type of Win64 EXE (Driver) file.

ql40xx.sys was first developed on 11/08/2006 in the Windows Vista Operating System for Windows Vista. The latest file version for Windows 7 is v2.1.3.20 (STOR wx64) released on 07/22/2009.

Continue reading below to discover detailed file information, SYS file troubleshooting, and free downloads of several versions of ql40xx.sys.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	ql40xx.sys
File Extension:	SYS file extension
Description:	QLogic iSCSI Storport Miniport Driver
Object File Type:	Driver
File Operating System:	Win32
MIME Type:	application/octet-stream
User Popularity Rating:

Developer and Software Information
Software Developer:	QLogic Corporation
Software Program:	QLA40XX iSCSI Host Bus Adapter
Legal Copyright:	© QLogic Corporation. All rights reserved.

File Details
Character Set:	Windows, Latin1
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x003f
Entry Point:	0x5a064
Code Size:	103424

View Other ql40xx.sys Information

File Info	Description
File Size:	126 kB
File Modification Date/Time:	2009:07:14 01:45:45+00:00
File Inode Change Date/Time:	2017:11:05 07:07:16+00:00
File Type:	Win64 EXE
MIME Type:	application/octet-stream
Machine Type:	AMD AMD64
Time Stamp:	2009:05:19 01:18:11+00:00
PE Type:	PE32+
Linker Version:	9.0
Code Size:	103424
Initialized Data Size:	266752
Uninitialized Data Size:	0
Entry Point:	0x5a064
OS Version:	6.1
Image Version:	6.1
Subsystem Version:	6.1
Subsystem:	Native
File Version Number:	2.1.3.20
Product Version Number:	2.1.3.20
File Flags Mask:	0x003f
File Flags:	(none)
File OS:	Win32
Object File Type:	Driver
File Subtype:	8
Language Code:	English (U.S.)
Character Set:	Windows, Latin1
Company Name:	QLogic Corporation
File Description:	QLogic iSCSI Storport Miniport Driver
File Version:	2.1.3.20 (STOR wx64)
Internal Name:	ql40xx.sys
Legal Copyright:	© QLogic Corporation. All rights reserved.
Original Filename:	ql40xx.sys
Product Name:	QLA40XX iSCSI Host Bus Adapter
Product Version:	2.1.3.20 (STOR wx64)

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

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What are ql40xx.sys Error Messages?

ql40xx.sys Blue Screen of Death (BSOD) Errors

There are a number of reasons why you could be encountering issues with ql40xx.sys. Most of the issues concerning sys files involve Blue Screen of Death (BSOD) errors. These types of ql40xx.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:

ql40xx.sys could not be found.
ql40xx.sys failed to load.
The file ql40xx.sys is missing or corrupt.
Windows failed to start - ql40xx.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: ql40xx.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] (ql40xx.sys).

STOP 0x0000007E: SYSTEM THREAD EXCEPTION NOT HANDLED (ql40xx.sys) STOP 0x00000050: PAGE FAULT IN A NONPAGED AREA (ql40xx.sys) STOP 0x0000003B: SYSTEM SERVICE EXCEPTION (ql40xx.sys) STOP 0×0000007A: KERNEL DATA INPAGE (ql40xx.sys) STOP 0x0000001E: KMODE EXCEPTION NOT HANDLED (ql40xx.sys) STOP 0x0000000A: IRQL NOT LESS EQUAL (ql40xx.sys)

It's Critical to Resolve Blue Screen of Death Errors

In the majority of cases, you will encounter ql40xx.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 ql40xx.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 ql40xx.sys Blue Screen of Death error after recent changes.

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How to Fix ql40xx.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 ql40xx.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 ql40xx.sys error, please proceed to the Step 2 below.

Step 2: Run SFC (System File Checker) to restore the corrupt or missing ql40xx.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 ql40xx.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 ql40xx.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 ql40xx.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 ql40xx.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 ql40xx.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 ql40xx.sys file version. We maintain a comprehensive database of 100% malware-free ql40xx.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 ql40xx.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 Vista: C:\Windows\System32\drivers\
Windows Vista: C:\Windows\System32\DriverStore\FileRepository\ql40xx.inf_9f936dea\
Windows 7: C:\Windows\System32\DriverStore\FileRepository\ql40xx.inf_amd64_neutral_77a826e5c0a07842\
Windows 7: C:\Windows\System32\drivers\

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 7.

GEEK TIP : We must emphasize that reinstalling Windows will be a very time-consuming and advanced task to resolve ql40xx.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 ql40xx.sys Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying ql40xx.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 ql40xx.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 Vista

File Name

Software Version

File Version

Architecture

ql40xx.sys

2.1.3.19

2.1.3.19 (STOR wx64)

32-bit (x32)

Expand for Detailed File Information +

OS Version:	Windows Vista
Software:	QLA40XX iSCSI Host Bus Adapter
Software Version:	2.1.3.19
File Version:	2.1.3.19 (STOR wx64)
File Size:	124008
File Date:	11/02/2006
MD5 Checksum:	e1c80f8d4d1e39ef9595809c1369bf2a
SHA1 Checksum:	b856db80e30a56bd750467afd3a1b53f431daee3
SHA256 Checksum:	5c18f8366049c690fc8aa4a992aa0765a6607f72e0ef889a5f3757e59fb1c143
CRC32:
File Directory Location:	C:\Windows\System32\drivers\ C:\Windows\System32\DriverStore\FileRepository ...

File Version, System, and Machine Information
File Type:	Win64 EXE
Image Version:	6.0
Initialized Data Size:	265728
Linker Version:	8.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Native
Subsystem Version:	6.0
File Modification Date/Time:	11/02/2006

Windows 7

File Name

Software Version

File Version

Architecture

ql40xx.sys

2.1.3.20

2.1.3.20 (STOR wx64)

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 7
Software:	QLA40XX iSCSI Host Bus Adapter
Software Version:	2.1.3.20
File Version:	2.1.3.20 (STOR wx64)
File Size:	128592
File Date:	07/14/2009
MD5 Checksum:	4f6d12b51de1aaeff7dc58c4d75423c8
SHA1 Checksum:	29529fc3edf901145d905f6f1575551b54f37dbf
SHA256 Checksum:	fb6abab741ced66a79e31a45111649f2fa3e26cee77209b5296f789f6f7d08de
CRC32:
File Directory Location:	C:\Windows\System32\DriverStore\FileRepository ... C:\Windows\System32\drivers\

File Version, System, and Machine Information
File Type:	Win64 EXE
Image Version:	6.1
Initialized Data Size:	266752
Linker Version:	9.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Native
Subsystem Version:	6.1
File Modification Date/Time:	07/14/2009

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Files Related to ql40xx.sys

SYS Files Related to ql40xx.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
nsiproxy.sys	NSI Proxy	Microsoft® Windows® Operating System (6.3.9600.17415)	27648	C:\Windows\Panther\UnattendGC\
adpahci.sys	Windows System Configuration	Windows Vista	339560	C:\Windows\Logs\DPX\
cbidf2k.sys	CardBus/PCMCIA IDE Miniport Driver	Microsoft® Windows® Operating System (5.1.2600.0)	13952	C:\Windows\System32\winevt\Logs\
udfs.sys	UDF File System Driver	Microsoft® Windows® Operating System (6.1.7601.17514)	328192	C:\Windows\System32\Sysprep\Panther\
exfat.sys	Microsoft Extended FAT File System	Microsoft® Windows® Operating System (6.3.9600.16384)	164864	C:\Windows\Panther\UnattendGC\

Other Files Related to ql40xx.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
OneX_v1.xsd	XML Schema Definition	Windows XP	5957	C:\Windows\L2Schemas\
WWAN_profile_v1.xsd	XML Schema Definition	Windows 10	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 10	7548	C:\Windows\L2Schemas\
WLAN_profile_v1.xsd	XML Schema Definition	Windows XP	15263	C:\Windows\L2Schemas\

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