What is kltdi?

Kltdi.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if kltdi.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for kltdi drivers in need of updating

Kltdi.sys file information

The process known as Network filtering component [fre_wnet_amd64 or Legacy Network Filter [fre_wnet_x64 or Network filtering component

belongs to software Kaspersky™ Anti-Virus or System Interceptors PDK or Kaspersky Internet Security (version 2013)

by Kaspersky Lab ZAO ( or AO Kaspersky Lab or Kaspersky Lab (

Description: Kltdi.sys is not essential for the Windows OS and causes relatively few problems. Kltdi.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 43,608 bytes (50% of all occurrences) or 44,000 bytes. 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program is not visible. The file has a digital signature. The service has no detailed description. The file is not a Windows core file. kltdi.sys appears to be a compressed file. Therefore the technical security rating is 20% dangerous.

Uninstalling this variant: If you encounter difficulties with kltdi.sys, you can also uninstall the associated program (Start > Control Panel > Uninstall a Program > Kaspersky Internet Security 2013), consult Kaspersky’s Customer Service or make sure that you have installed the latest version.

Recommended: Identify kltdi.sys related errors

Important: Some malware disguises itself as kltdi.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the kltdi.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


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Best practices for resolving kltdi issues

A clean and tidy computer is the key requirement for avoiding problems with kltdi. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the kltdi.sys process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

kltdi.sys [all]