ZoneAlarm ZoneAlarm Pro Antivirus+Firewall 2019 SYS kltdf.sys

Kltdf.sys BSOD Errors: Download and Troubleshoot

Last Updated: 11/25/2023
[Reading Time Required: 3.5 minutes]

kltdf.sys uses the SYS file extension, which is more specifically known as a TDI Network Connection Filter Driver [fre_wnet_x86] file. It is classified as a Win32 EXE (Driver) file, created for System Interceptors PDK by ZoneAlarm.

The initial introduction of kltdf.sys released in ZoneAlarm Pro Antivirus+Firewall 2019 15.6.028.18012 was for Windows 10 on 04/30/2019. This file marks the latest update from ZoneAlarm, according to our records.

Please continue reading to find your correct kltdf.sys file version download (free), detailed file information, and SYS file troubleshooting instructions.

File Analysis Provided by Jason Geater (Author)


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File Overview


General Information ✻
File Name: kltdf.sys
File Extension: SYS file extension
Description: TDI Network Connection Filter Driver [fre_wnet_x86]
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: 0x11000
Code Size: 46080
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What are kltdf.sys Error Messages?


kltdf.sys Blue Screen of Death (BSOD) Errors

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 These types of kltdf.sys errors can be cause by hardware problems, outdated firmware, corrupt drivers, or other software-related (eg.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

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: kltdf.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] (kltdf.sys).

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

It's Critical to Resolve Blue Screen of Death Errors

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

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How to Fix kltdf.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 kltdf.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):

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

If the Step 1 fails to resolve the kltdf.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):

  1. Hit the Windows Start button
  2. In the search box, type "Uninstall" and press "ENTER".
  3. In the search results, find and click "Add or Remove Programs"
  4. Find the entry for ZoneAlarm Pro Antivirus+Firewall 2019 15.6.028.18012 and click "Uninstall"
  5. 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 kltdf.sys error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

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

If Windows Update failed to resolve the kltdf.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 kltdf.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 kltdf.sys file version. We maintain a comprehensive database of 100% malware-free kltdf.sys files for every applicable version of ZoneAlarm Pro Antivirus+Firewall 2019. Please follow the steps below to download and properly replace you file:

  1. Locate your Windows operating system version in the list of below "Download kltdf.sys Files".
  2. Click the appropriate "Download Now" button and download your Windows file version.
  3. 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\x64\
  4. 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 kltdf.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 kltdf.sys Files (Malware-Tested 100% Clean)


CAUTION : We strongly advise against downloading and copying kltdf.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 kltdf.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.

Windows 10
Recommended Download (WinThruster): Optimize Your PC and Fix SYS File Association Errors.

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Files Related to kltdf.sys


SYS Files Related to kltdf.sys

File Name Description Software Program (Version) File Size (bytes) File Location
klim6.sys Packet Network Filter [fre_wlh_x64] System Interceptors PDK (14.0.0.18) 56520 C:\Windows\Temp\
kltdf.sys TDI Network Connection Filter Driver [fre_wnet_x64] System Interceptors PDK (14.0.0.7) 105664 C:\Windows\Temp\
klim6.sys Packet Network Filter [fre_win8_x86] System Interceptors PDK (14.0.0.18) 49344 C:\Windows\Temp\
klim6.sys Packet Network Filter [fre_win8_x64] System Interceptors PDK (14.0.0.18) 57032 C:\Windows\Temp\
klwfp.sys WFP Network Filter [fre_win8_x64] System Interceptors PDK (14.1.0.35) 100552 C:\Windows\Temp\

Other Files Related to kltdf.sys

File Name Description Software Program (Version) File Size (bytes) File Location
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-sysinf... ApiSet Stub DLL Microsoft® Windows® Operating System (10.0.10586.212) 19648 C:\Program Files (x86)\CheckPoint\ZoneAlarm\avsys\
diagwrn.xml Extensible Markup Language ZoneAlarm Pro Antivirus+Firewall 2019 15.6.028.18012 44683 C:\Windows\Panther\UnattendGC\
diagerr.xml Extensible Markup Language ZoneAlarm Pro Antivirus+Firewall 2019 15.6.028.18012 44109 C:\Windows\Panther\UnattendGC\
msvcp60.dll Microsoft (R) C++ Runtime Library Microsoft (R) Visual C++ (6.00.8972.0) 401462 C:\Program Files (x86)\CheckPoint\ZoneAlarm\avs...


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