How to remove an kl1 error

The file kl1.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 kl1.sys belonging to the Windows system or an application you can trust.

Run a free scan to check for kl1 drivers in need of updating

Kl1.sys file information

The process known as Kaspersky Unified Driver or Kaspersky Anti-Hacker Only Driver belongs to software Kaspersky Anti-Virus or Kaspersky Internet Security or Kaspersky Anti-Virus Personal or The Shield Deluxe (version 2008) or Kaspersky Anti-Virus for Windows Workstations by Kaspersky Lab (www.kaspersky.com).

Description: kl1.sys is located in the folder C:\Windows\System32\drivers. Known file sizes on Windows 7/XP are 18,795 bytes (37% of all occurrences), 110,360 bytes and 10 more variants.
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 system file. The service has no detailed description. kl1.sys seems to be a compressed file. Therefore the technical security rating is 25% dangerous, however also read the users reviews.
You could remove the entire program Kaspersky Internet Security or Kaspersky Anti-Virus using Windows Control Panel.

Recommended: Identify kl1.sys related errors

Important: Some malware camouflages itself as kl1.sys, particularly when located in the c:\windows or c:\windows\system32 folder. Therefore, you should check the kl1.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.

Score

User Comments

Part of Kaspersky Anti-Virus Personal
JL

I recently downloaded zonealarm security suite and noticed this file, after a quick browse i found that ZA is incorporating Kapersky into its scan software.
rune

Main KAV 5.xx 6.xx Kernel Driver
Whizard (further information)

been getting Blue screens recently, even when Zonealarm turned off, kl1.sys and vsdatant.sys seem to be problem, hopefully uninstall works
Ari

Found file on my computer :C:\WINDOWS\SYSTEM32\ZoneLabs\avsys\instdrivers\x32.(Size: 110360 bytes) Used to be in "windows\system32\drivers" according to a registry scan. But not there anymore.
hans

Kaspersky Unified Driver
Whizard

With Zone Alarm Internet Security Suite 7.x the file is located in C:\WINDOWS\system32\ZoneLabs\avsys\instdrivers\x32 andC:\WINDOWS\system32\ZoneLabs\avsys\instdrivers\w2kxp32
found1

kaspersky lap

trojan.tdss

It showed up on my computer after someone had opened one of those links sent on msn,When i type the letter 'k,l,or 1" all threee pop up at the same time, or typing other letters random ones will show up..
FackYouTrojan

Summary: Average user rating of kl1.sys: based on 12 votes with 10 reviews.

9 users think kl1.sys is essential for Windows or an installed application. 1 user think it's probably harmless. 2 users think kl1.sys is dangerous and recommend removing it.

Kl1 scanner

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