ZoneAlarm ZoneAlarm Pro Antivirus+Firewall 2019 SYS kl1.sys

Kl1.sys - Download and Fix Blue Screen Errors

Last Updated: 11/30/2024
[Time Needed for Reading: ~4-6 minutes]

kl1.sys is considered a type of Updatable component loader [fre_wnet_x64] file. It is most-commonly used in System Interceptors PDK developed by ZoneAlarm. It uses the SYS file extension and is considered a Win64 DLL (Driver) file.

The first release in the Windows 10 Operating System for kl1.sys was on 11/27/2019 inside ZoneAlarm Antivirus 15.8.008.18174. The most recent release for ZoneAlarm Pro Antivirus+Firewall 2019 15.6.028.18012 launched on 04/30/2019 [version 14.0.0.9 release].

Below, you find comprehensive file information, instructions for simple SYS file troubleshooting, and list of free kl1.sys downloads for each available file version.

File Analysis Provided by Jason Geater (Author)

File Overview

General Information ^✻
File Name:	kl1.sys
File Extension:	SYS file extension
Description:	Updatable component loader [fre_wnet_x64]
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:	AO Kaspersky Lab
Software Program:	System Interceptors PDK
Legal Copyright:	© 2017 AO Kaspersky Lab. All Rights Reserved.

File Details
Character Set:	Unicode
Language Code:	English (U.S.)
File Flags:	(none)
File Flags Mask:	0x003f
Entry Point:	0x6ff000
Code Size:	99840

View Other kl1.sys Information

File Info	Description
File Size:	516 kB
File Modification Date/Time:	2019:12:16 15:56:15+00:00
File Type:	Win64 DLL
MIME Type:	application/octet-stream
Machine Type:	AMD AMD64
Time Stamp:	2018:02:20 10:38:30+00:00
PE Type:	PE32+
Linker Version:	14.0
Code Size:	99840
Initialized Data Size:	397312
Uninitialized Data Size:	6830592
Entry Point:	0x6ff000
OS Version:	5.2
Image Version:	5.2
Subsystem Version:	5.2
Subsystem:	Native
File Version Number:	14.0.0.9
Product Version Number:	14.0.0.9
File Flags Mask:	0x003f
File Flags:	(none)
File OS:	Windows NT 32-bit
Object File Type:	Driver
File Subtype:	7
Language Code:	English (U.S.)
Character Set:	Unicode
Company Name:	AO Kaspersky Lab
File Description:	Updatable component loader [fre_wnet_x64]
File Version:	14.0.0.9
Internal Name:	kl1
Legal Copyright:	© 2017 AO Kaspersky Lab. All Rights Reserved.
Product Name:	System Interceptors PDK
Product Version:	14.0.0.9
Legal Trademarks:	Registered trademarks and service marks are the property of their respective owners

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

Optional Offer for WinThruster by Solvusoft | EULA | Privacy Policy | Terms | Uninstall

What are kl1.sys Error Messages?

kl1.sys Blue Screen of Death (BSOD) Errors

There are a number of reasons why you could be encountering issues with kl1.sys. Most of the issues concerning sys files involve Blue Screen of Death (BSOD) errors. These types of kl1.sys errors can be cause by hardware problems, outdated firmware, corrupt drivers, or other software-related (eg. ZoneAlarm Pro Antivirus+Firewall 2019 update) issues. Some of these errors include:

kl1.sys could not be found.
kl1.sys failed to load.
The file kl1.sys is missing or corrupt.
Windows failed to start - kl1.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: kl1.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] (kl1.sys).

STOP 0x00000050: PAGE FAULT IN A NONPAGED AREA (kl1.sys) STOP 0x0000000A: IRQL NOT LESS EQUAL (kl1.sys) STOP 0x0000007E: SYSTEM THREAD EXCEPTION NOT HANDLED (kl1.sys) STOP 0×0000007A: KERNEL DATA INPAGE (kl1.sys) STOP 0x0000001E: KMODE EXCEPTION NOT HANDLED (kl1.sys) STOP 0x0000003B: SYSTEM SERVICE EXCEPTION (kl1.sys)

It's Critical to Resolve Blue Screen of Death Errors

In the majority of cases, you will encounter kl1.sys BSOD errors after you've installed new hardware, software (ZoneAlarm Pro Antivirus+Firewall 2019), or performed a failed Windows Update. In other cases, software corruption caused by a malware infection can lead to kl1.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 kl1.sys Blue Screen of Death error after recent changes.

Optional Offer for WinThruster by Solvusoft | EULA | Privacy Policy | Terms | Uninstall

How to Fix kl1.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 kl1.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 kl1.sys error, please proceed to the Step 2 below.

Step 2: If recently installed ZoneAlarm Pro Antivirus+Firewall 2019 (or related software), uninstall then try reinstalling ZoneAlarm Pro Antivirus+Firewall 2019 software.

You can uninstall ZoneAlarm Pro Antivirus+Firewall 2019 software by following these instructions (Windows XP, Vista, 7, 8, and 10):

Hit the Windows Start button
In the search box, type "Uninstall" and press "ENTER".
In the search results, find and click "Add or Remove Programs"
Find the entry for ZoneAlarm Pro Antivirus+Firewall 2019 15.6.028.18012 and click "Uninstall"
Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall ZoneAlarm Pro Antivirus+Firewall 2019 software.

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

ZoneAlarm Pro Antivirus+Firewall 2019 15.6.028.18012

ZoneAlarm

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 kl1.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 kl1.sys error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

Optional Offer for WinThruster by Solvusoft | EULA | Privacy Policy | Terms | Uninstall

If Those Steps Fail: Download and Replace Your kl1.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 kl1.sys file version. We maintain a comprehensive database of 100% malware-free kl1.sys files for every applicable version of ZoneAlarm Pro Antivirus+Firewall 2019. Please follow the steps below to download and properly replace you file:

Locate your Windows operating system version in the list of below "Download kl1.sys Files".
Click the appropriate "Download Now" button and download your Windows file version.
Copy this file to the appropriate ZoneAlarm Pro Antivirus+Firewall 2019 folder location:

Windows 10: C:\Program Files (x86)\CheckPoint\ZoneAlarm\avsys\install\instdrivers\kl1\x86\
Windows 10: C:\Program Files (x86)\CheckPoint\ZoneAlarm\avsys\install\instdrivers\kl1\x86\win8\
Windows 10: C:\Windows\System32\drivers\
Windows 10: C:\Program Files (x86)\CheckPoint\ZoneAlarm\avsys\install\instdrivers\kl1\x64\
Windows 10: C:\Program Files (x86)\CheckPoint\ZoneAlarm\avsys\install\instdrivers\kl1\x64\win8\
Show 3 more directories +
Windows 10: C:\Windows\System32\DRVSTORE\kl1_ED108517744368E24DA325088E4C0503698B7525\
Windows 10: C:\Program Files (x86)\CheckPoint\ZoneAlarm\avsys\install\instdrivers\kl1\x86\
Windows 10: C:\Program Files (x86)\CheckPoint\ZoneAlarm\avsys\install\instdrivers\kl1\x64\
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 kl1.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.

Optional Offer for WinThruster by Solvusoft | EULA | Privacy Policy | Terms | Uninstall

Download kl1.sys Files (Malware-Tested 100% Clean)

CAUTION : We strongly advise against downloading and copying kl1.sys to your appropriate Windows system directory. ZoneAlarm typically does not release ZoneAlarm Pro Antivirus+Firewall 2019 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 kl1.sys and all other SYS files for ZoneAlarm Pro Antivirus+Firewall 2019. An incorrectly installed SYS file may create system instability and could cause your program or operating system to stop functioning altogether. Proceed with caution.

ZoneAlarm Pro Antivirus+Firewall 2019 15.6.028.18012

File Name

Software Version

File Version

Architecture

kl1.sys

14.0.0.9

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	System Interceptors PDK
Software Version:	14.0.0.9
File Version:	14.0.0.9
File Size:	151232
File Date:	12/16/2019
MD5 Checksum:	73d5c6fd8586ce77ff211b3961d72eec
SHA1 Checksum:	c1b304ef1fb2319c5a257ec549ff39c0ee02dffe
SHA256 Checksum:	1a8a02878b91f82b1b9b0be0e1bf282632f3bbeba3c30a51c150386c6e12026d
CRC32:
File Directory Location:	C:\Program Files (x86)\CheckPoint\ZoneAlarm\av ... C:\Program Files (x86)\CheckPoint\ZoneAlarm\av ...

File Version, System, and Machine Information
File Type:	Win32 DLL
Image Version:	5.2
Initialized Data Size:	29184
Linker Version:	14.0
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	5.2
File Modification Date/Time:	12/16/2019

kl1.sys

14.0.0.9

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	System Interceptors PDK
Software Version:	14.0.0.9
File Version:	14.0.0.9
File Size:	528576
File Date:	12/16/2019
MD5 Checksum:	93f23633bb1468f79f04ed58c8c77558
SHA1 Checksum:	d8dc0e09e214156e22f5d2c1cdbbb95daba270ce
SHA256 Checksum:	f751b701b3831ec4b5ca50c47e9495ef0d4ef9b4fc8eb93a88f1064978539bb4
CRC32:
File Directory Location:	C:\Windows\System32\drivers\ C:\Program Files (x86)\CheckPoint\ZoneAlarm\av ... C:\Program Files (x86)\CheckPoint\ZoneAlarm\av ... C:\Windows\System32\DRVSTORE\kl1_ED10851774436 ...

File Version, System, and Machine Information
File Type:	Win64 DLL
Image Version:	5.2
Initialized Data Size:	397312
Linker Version:	14.0
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Native
Subsystem Version:	5.2
File Modification Date/Time:	12/16/2019

ZoneAlarm Antivirus 15.8.008.18174

File Name

Software Version

File Version

Architecture

kl1.sys

30.5.76.0

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Coretech Delivery
Software Version:	30.5.76.0
File Version:	30.5.76.0
File Size:	145752
File Date:	12/06/2019
MD5 Checksum:	d3ecb318931dc006ff3325a0e1cfde30
SHA1 Checksum:	51b9b3e9777f1bb2318761cbeada09fbaf34295f
SHA256 Checksum:	d1e78e4d139e84eb948419e13266ef1a292d40f4ab9e92443a3454cb1cf9a22c
CRC32:
File Directory Location:	C:\Program Files (x86)\CheckPoint\ZoneAlarm\av ...

File Version, System, and Machine Information
File Type:	Win32 EXE
Image Version:	6.1
Initialized Data Size:	28672
Linker Version:	14.16
Machine Type:	Intel 386 or later, and compatibles
PE Type:	PE32
Subsystem:	Native
Subsystem Version:	6.1
File Modification Date/Time:	12/06/2019

kl1.sys

30.5.76.0

64-bit (x64)

Expand for Detailed File Information +

OS Version:	Windows 10
Software:	Coretech Delivery
Software Version:	30.5.76.0
File Version:	30.5.76.0
File Size:	531280
File Date:	12/06/2019
MD5 Checksum:	117285327d9c153408ab0224819263da
SHA1 Checksum:	4713c43e676f98a991f81608822474935de873db
SHA256 Checksum:	243dc23404bcddb94b39a798b97f093a1ac51911081c5fa5ca075cdb90a23849
CRC32:
File Directory Location:	C:\Program Files (x86)\CheckPoint\ZoneAlarm\av ...

File Version, System, and Machine Information
File Type:	Win64 EXE
Image Version:	6.1
Initialized Data Size:	398848
Linker Version:	14.16
Machine Type:	AMD AMD64
PE Type:	PE32+
Subsystem:	Native
Subsystem Version:	6.1
File Modification Date/Time:	12/06/2019

Optional Offer for WinThruster by Solvusoft | EULA | Privacy Policy | Terms | Uninstall

Files Related to kl1.sys

SYS Files Related to kl1.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
klupd_klif_mark.sys	Kaspersky Lab Anti-Rootkit Memory Driver	Kaspersky Bases (6.2.9.0)	204520	C:\Windows\ServiceProfiles\NetworkService\AppDa...
kltdi.sys	Legacy Network Filter [fre_wnet_x64]	System Interceptors PDK (14.0.0.5)	81632	C:\Windows\Temp\
klim6.sys	Packet Network Filter [fre_win8_x86]	System Interceptors PDK (14.0.0.18)	49344	C:\Windows\Temp\
klflt.sys	Filter Core [fre_wlh_x64_sdk_noagava]	System Interceptors PDK (16.1.7.0)	219328	C:\Windows\ServiceProfiles\NetworkService\AppDa...
klflt.sys	Filter Core [fre_win8_x86_sdk_noagava]	System Interceptors PDK (16.1.7.0)	174272	C:\Windows\ServiceProfiles\NetworkService\AppDa...

Other Files Related to kl1.sys

File Name	Description	Software Program (Version)	File Size (bytes)	File Location
CBS.log	Log	ZoneAlarm Pro Antivirus+Firewall 2019 15.6.028.18012	888398	C:\Windows\Logs\CBS\
WmiApRpl.ini	Windows Initialization	ZoneAlarm Pro Antivirus+Firewall 2019 15.6.028.18012	29736	C:\Windows\inf\WmiApRpl\0009\
WmiApRpl.h	C/C++/Objective-C Header	ZoneAlarm Pro Antivirus+Firewall 2019 15.6.028.18012	3444	C:\Windows\System32\wbem\Performance\
api-ms-win-core-heap-l...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.14393.33)	18112	C:\Program Files (x86)\CheckPoint\Install\
api-ms-win-core-sysinf...	ApiSet Stub DLL	Microsoft® Windows® Operating System (10.0.17134.12)	12136	C:\Users\Tester\AppData\Local\Microsoft\OneDriv...

Optional Offer for WinThruster by Solvusoft | EULA | Privacy Policy | Terms | Uninstall

Browse Other File Extensions in Alphabetical Order : # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

You are downloading trial software. The purchase of a one-year software subscription at the price of $29.97 USD is required to unlock all software features. Subscription auto-renews at the end of the term (Learn more). By clicking the "Start Download" button above and installing "Software", I acknowledge I have read and agree to the Solvusoft End User License Agreement and Privacy Policy.