What is klif?
The genuine klif.sys file is a software component of Kaspersky Anti-Virus by Kaspersky Lab.
"Klif.sys" usually resides in "C:\Windows\System32\drivers". It is an important driver file component of the antivirus software from Kaspersky Lab. It is also used in Zone Alarm software from CheckPoint Software Technologies. At least 12 malware threats have known associations with the name as well. The authentic version's recommended removal method is the Kaspersky Removal Tool which can be downloaded from their website. Sometimes called a "Mini-Filter," it is most likely an anti-rootkit scanner and is able to hook into the system kernel. It has been reported in Windows crashes as causing a "page fault in a nonpaged area," sometimes happening at the login screen preventing system access to remove it. Kaspersky Lab North America, founded in 2004, is the world's largest privately-owned cybersecurity company and one of the fastest-growing, headquartered in Massachusetts, USA with offices in 32 countries. Their technology is widely licensed by other companies in the field for use in their products.
KLIF stands for Kaspersky Lab Intruder Filter
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 operating system, hardware etc.
The free file information forum can help you determine if klif.sys is a Windows system file or if it belongs to an application that you can trust.
Run a free scan to check for klif drivers in need of updating
Since 2005, file.net has researched facts about Windows processes and files, analyzed user experiences, and examined files using its own analysis tools. Around 10,000 users rely on it every day.
Klif.sys file information
The process known as Klif Mini-Filter [fre_wlh_x86 or Klif Mini-Filter [fre_win8_x64 or Klif Mini-Filter [fre_wnet_x86_noagava or spuper-ptor or Klif Mini-Filter [fre_wlh_AMD64_noagava or Klif Mini-Filter [fre_wlh_x64_noagava or Malwarebytes Anti-Malware or Kaspersky Lab Driver
belongs to software Kaspersky Anti-Virus or nexgbbq
by Kaspersky Lab (www.kaspersky.com) or Kaspersky Lab ZAO (www.kaspersky.com) or Malwarebytes (www.malwarebytes.org).
Description: Klif.sys is not essential for Windows and will often cause problems. The klif.sys file is located in the C:\Windows\System32\drivers folder.
Known file sizes on Windows 10/11/7 are 586,584 bytes (25% of all occurrences), 773,304 bytes, 595,552 bytes or 318,040 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 is not a Windows core file. The file is digitally signed. The program can be removed using the Control Panel's Add\Remove programs applet.
Klif.sys is able to manipulate other programs.
klif.sys appears to be a compressed file.
Therefore the technical security rating is 1% dangerous; but you should also compare this rating with the user reviews.
Uninstalling this variant:
If problems with
ZoneAlarm Antivirus or
Kaspersky Lab occur, you could also uninstall the associated program (Start > Control Panel >
Uninstall a Program).
Recommended: Identify klif.sys related errors
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.
Best practices for resolving klif issues
A clean and tidy computer is the key requirement for avoiding problems with klif. 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 executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To get your computer running as fast as it did on day one, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
To help you analyze the klif.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. A good Bantivirus software detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.
Other processes
mycloud desktop.exe athserver.exe lgmoushk.dll klif.sys stunnel.exe osdmnuu.exe installbrainservice.exe receiver.exe dpotspluginie8.dll networkgenie.exe dfxitunessong.exe [all]
Score
User Comments
Face
Azgeezer
mv (further information)
SciYann (further information)
Matt
Joda (further information)
Grant
longboneslinger (further information)
Whizard (further information)
Party boy
TPW
Bill Keenan (further information)
Abhishek
Veron
Mircea
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Dave
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Zaphod of www.spambotsecurity.com (further information)
Acr0nym
Nollij
Jones
Brian Tower
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cyberangel
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Richard Hill (further information)
mirgil
justin
Michael W.
FP
Summary: Average user rating of klif.sys: based on 44 votes with 35 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. 11 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").