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What is klif?

Klif.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 OS, hardware etc.
The free file information forum can help you determine if klif.sys belonging to the Windows system or an application you can trust.

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

Klif.sys file information

The process known as Klif Mini-Filter or spuper-ptor or Klif Mini-Filter [fre_wxp_x86 or Klif Mini-Filter fre_wnet_x86 or Klif Mini-Filter [fre_win8_x64 or Kaspersky Lab Driver or Klif Mini-Filter [fre_wlh_x86 or Klif Mini-Filter [fre_wnet_x86_noagava

belongs to software Kaspersky Anti-Virus or Anti-Virus or PC Tools AntiVirus or ZoneAlarm Security Suite or TSP or Kaspersky Internet Security or ParetoLogic Anti-Virus PLUS

by Kaspersky Lab (www.kaspersky.com) or Kaspersky Labs (www.kaspersky.com) or Kaspersky Lab ZAO (www.kaspersky.com).

Description: Klif.sys is not essential for Windows and will often cause problems. klif.sys is located in the folder C:\Windows\System32\drivers. Known file sizes on Windows 7/XP are 127,768 bytes (38% of all occurrences), 129,808 bytes and 35 more variants. http://www.file.net/process/klif.sys.html 
The driver can be started or stopped from Services in the Control Panel or by other programs. The program has no visible window. The file is not a Windows system file. You can uninstall this program in the control panel. Therefore the technical security rating is 13% dangerous, however also read the users reviews.
You can completely remove Anti-Virus or Kaspersky Internet Security (Control Panel⇒Add/Remove programs).

Recommended: Identify klif.sys related errors

If klif.sys is located in a subfolder of C:\Windows\System32, the security rating is 31% dangerous. The file size is 174,864 bytes. The program has no visible window. The service has no detailed description. Klif.sys is not a Windows system file.
You can completely remove ZoneAlarm Security Suite (Control Panel⇒Add/Remove programs).

If klif.sys is located in a subfolder of "C:\Program Files", the security rating is 44% dangerous. The file size is 117,008 bytes. Klif.sys is a file without information about the developer of this file. The program has no visible window. The service has no detailed description. The file is not a Windows core file.
You can completely remove PC Tools AntiVirus (Control Panel⇒Add/Remove programs).

Important: Some malware disguises itself as klif.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the klif.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.


User Comments

Kaspersky Antivirus
It's required for Windows XP SP2 to shut down properly when used with Kaspersky Anti-virus Pro 5.0
i think its part of kaspersky anti-hacker
  mv   (further information)
belongs to the Kaspersky Antivirus
  SciYann   (further information)
Kaspersky Antivirus anti-rootkit driver, using rootkit technology.
KLIF = _K_aspersky _L_ab _I_nternet _F_irewall
  Joda   (further information)
it appers as the faulty driver during BSODs i commonly get
Kaspersky anti-virus vulnerability
  longboneslinger   (further information)
Kaspersky Antivirus
  Whizard   (further information)
Supposedly KLIF stands for kaspersky lab internet firewall but I only have kaspersky antivirus 6.0
  Party boy  
I have never used any Kaspersky software but this file just caused XP SP2 to blue screen
Also part of ESCAN anti-virus which is based on Kaspersky
  Bill Keenan   (further information)
Double click on drive (same on which operationg system XP with SP2) is installed generates system dump (Blue Screen). And antivirus that i am using is Norton. Blue screen says klif.sys generated error.
avast recognizes it as a rootkit, and doesn't leave me alone, it shows up every 2minutes.
Aparently I can't remove klif and I also can't reinstall Kaspersky
Component of KAV
Malicious rootkit component. Registered as a service, at which point the serivce and reg keys are wiped (zeroed + delete)
Kaspersky Anti-virus
i noe it is by Kaspersky but anyway to remove it
I can delete klif.sys from safemode but MSWindows or Kasperksy reinstallls it and the loop is complete
couldn't download from the web... crashed my computer,and redirected me to the blue screen.
  dennis soto  
This file is also installed with Zone Alarm Free, is not needed for Free (as the AV of Zone Alarm Pro/Suite is Kapersky), and causes problems with C:\System Volume Information\tracking.log hanging virus scanners.
  Zaphod of www.spambotsecurity.com   (further information)
found in "C:\WINDOWS\system32\ZoneLabs\avsys" Fails to start according to my system log, I am running XP,
Part of Kaspersky
klif.sys is the Kaspersky Lab Interceptor and Filter - aka - Kaspersky Lab Driver. It is known to cause BSOD errors from time to time. It is essential ONLY if you are using Kaspersky Antivirus. Otherwise uninstall it or remove it.
Appears to be halting Win2003 Server Processes
  Brian Tower  
repeated BSOD - last event before critical event (event ID 41 -the system has rebooted without cleanly shutting down first) is "File System Filter 'KLIF' 96.0, 2009-11-11T09:32:39.00000000Z) has successfully loaded and registered with file system manager"
Rootkit Unhooker flags it but I have Kaspersky
Kaspersky AVZ4 rate this file as suspicious. I am going to investigate more about it
Causes Blue screens every other day. Belongs to Kaspersky products
  Richard Hill   (further information)
it freezes my Mac -I installed it in Windows on Parallels, but it installed itself on my OS X volume and is impssible to remove.
use bluescreen view to analyze dump
Kaspersky AV 2012 failing to install on Win XP SP2. "Copy Error: Setup cannot copy the file klif.sys"
My computer has been running slow. I used Not My Fault to crash my system. When I logged on my system and went onto Nirsoft Bluescreenview, two of the lines on the preview say this: The problem seems to be caused by the following file: klif.sys IRQL_GT_ZERO_AT_SYSTEM_SERVICE,
  Michael W.  

Rating chart

Summary: Average user rating of klif.sys: based on 42 votes with 34 user comments.
18 users think klif.sys is essential for Windows or an installed application. 7 users think it's probably harmless. 4 users think it's neither essential nor dangerous. 9 users suspect danger. 4 users think klif.sys is dangerous and recommend removing it. 5 users don't grade klif.sys ("not sure about it").

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Klif scanner

Security Task Manager shows all running Windows tasks including embedded hidden functions (e.g. keyboard or browser monitoring, autostart entry). A unique security risk rating indicates the likelihood of the process being potential spyware, malware, keylogger or a Trojan.

Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, trojans, keyloggers, malware and tracking threats from your hard disk. Ideal supplement to Security Task Manager.

SpeedUpMyPC scans, cleans, repairs and optimizes your computer.

Other processes

klif.sys [all]