Kaspersky Error 27300 Klif.sys-x64 May 2026
Dealing with Kaspersky Error 27300 involving the klif.sys-x64 driver can be incredibly frustrating, especially when it halts your security setup. This error typically signifies a failure during the driver installation process, often due to remnants of previous software, system file corruption, or conflicts with other drivers.
Below is a comprehensive guide to understanding and fixing this specific issue. What is klif.sys-x64?
The klif.sys (Kaspersky Log Inspection Filter) file is a vital kernel-mode driver used by Kaspersky applications for real-time protection, such as monitoring file system activity and blocking rootkits. The "x64" suffix indicates it is the 64-bit version of this driver. When Error 27300 occurs, the Windows installer is unable to correctly register this driver into the system's driver stack. Common Causes of Error 27300
Kaspersky Error 27300 occurs when the installer fails to install the driver
. This is usually caused by leftover files from previous installations or conflicts with network filter drivers from third-party software like VMware, Cisco AnyConnect, or WinPcap. 🛠️ Step 1: Clean Up Previous Installations
The most common cause is "residue" from a past antivirus version. Download the official kavremover tool Kaspersky Support Run the tool as an Administrator
Select the product you previously had (or let it auto-detect). your computer immediately after the tool finishes. 🌐 Step 2: Fix Network Driver Conflicts This error often triggers if the NDIS filter is overloaded or corrupted by other software. Reinstall VPNs/Virtualization: If you use Cisco AnyConnect , uninstall and then reinstall them. Check Network Services: services.msc , and hit Enter. Network Setup Service Ensure its Startup Type 💻 Step 3: Verify System Integrity Corrupted system files can prevent driver registration. Command Prompt as Administrator. sfc /scannow and press Enter. Wait for the scan to finish and repair any files. Run Windows Update to ensure your OS is fully patched. 🛑 Step 4: Final Installation Attempt Download a fresh installer of the latest Kaspersky version
Disable any other active firewall or "cleanup" software during the install. If you are in the United States , note that Kaspersky services have faced significant federal restrictions and bans due to national security concerns. If the error persists, you may need to Reset your PC via Windows Settings to clear deep-rooted registry errors. If you'd like to try a specific tool, let me know: Do you have installed? Are you on Windows 10 Are you trying to install the
Error 27300 when installing a Kaspersky application for home
Here’s a general customer-style review for Kaspersky Error 27300 (klif.sys-x64). You can use it as-is or adapt it to your specific experience.
Title: Frustrating driver conflict – Error 27300 with klif.sys-x64
Rating: ⭐⭐ (2/5)
I ran into Kaspersky Error 27300 while trying to install or update the software. The error points to klif.sys-x64, which is a core driver component. In my case, the installation would roll back, and the protection wouldn’t start.
What the error means:
klif.sys is Kaspersky’s low‑level system driver. Error 27300 generally indicates a conflict – often with another security driver (leftover antivirus, game anti‑cheat software like EasyAntiCheat, or even buggy VPN drivers).
What I tried (and worked partially):
- Booting into Safe Mode and cleaning leftover drivers with Kaspersky’s
kavremovertool. - Disabling Memory Integrity (Core Isolation) in Windows Security – this helped in some cases.
- Manually deleting remnants of previous antivirus software (Norton, McAfee, Avast).
- Running the installer with
msiexec /i setup.exe /l*v log.txtto see the exact driver failing.
The fix that finally worked for me:
I had to disable Hyper‑V and Virtualization‑Based Security in Windows Features, reboot, install Kaspersky, then re‑enable them. That’s not ideal for regular users.
Pros:
- Once installed, Kaspersky protection works well.
- Support articles exist (but are technical).
Cons:
- Error 27300 is a major installation blocker.
- Not beginner‑friendly – you may need Safe Mode, registry checks, or driver conflict hunting.
- Can conflict with Windows security features that should just work together.
Verdict:
If you’re comfortable troubleshooting driver conflicts, you’ll likely solve it. For average users, this error can be a dealbreaker. Kaspersky needs to make their klif.sys driver more resilient against modern Windows virtualization and third‑party security tools.
Would I recommend? Only if you have the patience to debug driver issues – otherwise try a different AV that doesn’t trigger Error 27300.
Technical Incident Report: Kaspersky Error 27300 (klif.sys-x64) Executive Summary
Error 27300 is a common installation failure encountered when deploying or updating Kaspersky security software. It typically signifies a driver installation error related to the klif.sys-x64 file, which is Kaspersky's core infrastructure driver. The error prevents the installer from successfully adding the necessary driver to the system's network adapter or file system. Root Cause Analysis
The error occurs primarily due to a conflict or corruption within the operating system's driver catalog or cryptographic services. Key triggers include:
Leftover Files: Residual drivers or registry keys from previous Kaspersky installations that were not cleanly removed.
Cryptographic Service Failures: Corruption in the Windows Catroot2 folder or issues with digital signature validation (Error 0x8000ffff). kaspersky error 27300 klif.sys-x64
Third-Party Conflicts: Interference from other security software (e.g., McAfee) or network-related applications like VMware, Cisco AnyConnect, or WinPcap.
OS Integrity Issues: Corrupted system files or missing Windows updates that prevent proper driver signing. Recommended Resolutions 1. Perform a Clean Removal
Error 27300 when installing a Kaspersky application for home
Error 27300 is a critical installation error in Kaspersky products that
occurs when the installer fails to properly register or start a specific system driver klif.sys-x64 driver is the core Kaspersky Interceptor and Filter
driver, responsible for monitoring system activity and intercepting potential threats. Common Causes
Error 27300 when installing a Kaspersky application for home
2. Remove Other Antivirus Software Completely
Conflicting drivers are a prime suspect. Use the uninstaller of any other security product, then run its vendor’s removal tool (e.g., McAfee Consumer Product Removal tool, Norton Removal Tool). Reboot afterward.
Summary
This error is a fascinating example of "security vs. security." Windows is trying to secure the kernel using Core Isolation, and Kaspersky is trying to secure the kernel using its own driver (klif.sys). Error 27300 is the system flagging a "double-booking" of the security layer.
Kaspersky Error 27300 a critical installation failure that occurs when the installer cannot register the klif.sys-x64
driver (Kaspersky Interceptor and Filter) into the Windows operating system
. This driver is essential for low-level system monitoring and malware interception. Core Root Causes
The error typically stems from one of three primary system-level conflicts: Operating System Integrity Issues : Corruption in Windows Cryptographic Services Catalog Database
prevents the driver's digital signature from being validated. Driver Residue
: Leftover registry keys or system files from previous Kaspersky installations—or third-party antivirus software like McAfee—blocking the new driver's registration. Filter Driver Overload
: Windows has a limit on the number of network or system filter drivers (NDIS filters). Third-party apps like Cisco AnyConnect can exhaust these slots. Kaspersky Support Forum Deep Feature Fixes 1. Reset the Cryptographic Catalog (Catalog Database)
If your system logs show "Catastrophic failure" (Error 0x8000ffff), the OS cannot verify the driver's catalog file. Command Prompt as Administrator. Stop the service: net stop cryptsvc Navigate to the directory: cd %systemroot%\system32 Rename the corrupted folder: ren catroot2 catroot2_old
Restart the computer; Windows will automatically rebuild a clean catalog folder. 2. Aggressive Driver Cleanup
Standard uninstallation often leaves "ghost" drivers that trigger Error 27300. Kaspersky Support Forum Use Kavremover : Run the official Kaspersky Removal Tool (kavremover) to strip all hidden registry entries. Manual Driver Deletion kavremover
fails, use an elevated Command Prompt to manually remove the service entry: sc delete klif sc delete klim6 if a network driver is also failing). Kaspersky Support Forum 3. Resolve Third-Party Filter Conflicts
Conflicting applications can "lock" the filter driver slots required by Check for Incompatible Apps
: Temporarily uninstall software that uses deep-system filters, such as Cisco AnyConnect VMware Workstation Verify Services : Ensure the Network Setup Service is present and set to 4. Check Disk and OS Health
Physical disk errors can prevent driver files from writing to the %system32%\drivers Disk Check wmic diskdrive get status in the command line. If it returns anything other than , your hardware may be failing. System File Checker sfc /scannow
to repair general Windows integrity issues that might be blocking the Microsoft Windows Installer (MSI) PowerShell commands Dealing with Kaspersky Error 27300 involving the klif
to verify how many NDIS filter drivers are currently active on your system?
Error 27300 when installing a Kaspersky application for home
Connect a Keyboard: Surprisingly, this error often triggers if no physical keyboard is connected to the computer or server during installation. Kaspersky Support recommends connecting one before retrying.
Use the kavremover Tool: Residual files from previous Kaspersky installations can block the driver. Use the Kaspersky kavremover utility to completely wipe previous versions before a clean install.
Download the Latest Version: This specific bug is frequently addressed in newer builds. Ensure you are using the latest installer from the official website.
Run as Administrator: Ensure you are launching the installer with full administrative privileges to allow system-level driver installation.
If the error persists and results in a Blue Screen of Death (BSoD), you may need to capture a memory dump and contact technical support.
Kaspersky Error 27300 is a specific installation failure that occurs when the installer cannot correctly register or start essential system drivers, such as klif.sys (Kaspersky Log Inspection Filter) or klim6.sys. The "x64" designation refers to the 64-bit version of these drivers, which are critical for the antivirus to interact with the Windows kernel. Common Root Causes
This error usually indicates a conflict between the new installation and existing system states.
Residual Files: Leftover drivers from previous Kaspersky versions or other security software (e.g., McAfee) can block the new driver from installing.
Operating System Corruption: Violations of OS integrity, specifically issues with Cryptographic Services or the catalog database for drivers, prevent Windows from validating the driver's signature.
Insufficient Permissions: The installer lacks the necessary administrative rights to write to protected system directories or modify registry keys.
Third-Party Network Drivers: Software that uses NDIS filters—such as VMware, Cisco AnyConnect, or WinPcap—can conflict with Kaspersky's network filter drivers. Step-by-Step Fixes
To resolve Error 27300, follow these solutions in order from simplest to most advanced: 1. Use the Kaspersky Removal Tool (kavremover)
Standard uninstallation often leaves behind deep-seated registry keys or driver files that trigger this error during a reinstall. Download the official kavremover tool. Run the tool as an administrator.
Select your product from the list and let it clean all traces.
Restart your computer before attempting the installation again. 2. Repair Cryptographic Services
If the error is tied to driver validation, you may need to reset the Windows catalog database. Open the Command Prompt as an administrator.
Type net stop cryptsvc and press Enter to stop Cryptographic Services.
Type ren %systemroot%\System32\catroot2 catroot2.old and press Enter to rename the folder.
Restart your PC; Windows will automatically recreate a clean version of this folder, which may fix the driver registration issue. 3. Address Software Conflicts
Uninstall Incompatible Apps: Remove any other antivirus software or VPN clients (like Cisco AnyConnect) that might be competing for the same driver resources.
Clean Registry: Use a tool like CCleaner to remove orphaned registry entries related to failed installations. 4. Run System Integrity Checks
If system files are corrupted, the driver cannot load into the kernel. Title: Frustrating driver conflict – Error 27300 with
Run the System File Checker by typing sfc /scannow in an elevated Command Prompt.
Use the DISM tool for deeper repairs: DISM.exe /Online /Cleanup-image /Restorehealth. Final Considerations
Blog Title: Troubleshooting Guide: Decoding Kaspersky Error 27300 (klif.sys-x64)
Published: April 23, 2026 | Category: Technical Support | Reading Time: 4 minutes
If you are reading this, you’ve likely just tried to install or update Kaspersky Endpoint Security or Kaspersky Internet Security, only to be met with a frustrating red box containing: “Error 27300. Failed to start driver. klif.sys-x64.”
Don’t panic. While this error looks like a complex registry meltdown, it is actually a very specific (and solvable) conflict between Kaspersky’s core driver and your Windows operating system.
Here is everything you need to know about what is causing the klif.sys error and how to fix it.
Step-by-Step Fixes for Kaspersky Error 27300 (klif.sys-x64)
Below are 9 proven methods. Start with Method 1 and move down only if the error persists.
What exactly is happening?
- Error Code: 27300
- The Culprit:
klif.sys-x64 - What it means:
klif.sysis the Kaspersky Lab Interface Driver. It is the lowest-level kernel driver that allows Kaspersky to scan network traffic, monitor file system activity, and block threats in real-time. The-x64suffix indicates you are running 64-bit Windows.
When the installer hits Error 27300, it means Windows refused to load this driver. Usually, this is because Windows Security (or a third-party antivirus) is blocking it, or because a previous security driver wasn't fully cleaned up.
5. Conclusion
Error 27300 regarding klif.sys-x64 is almost exclusively an environment issue rather than a bug in the software itself. The failure is caused by the Windows environment rejecting the driver installation due to security conflicts or leftover registry debris. In 90% of cases, running the official kavremover tool and rebooting resolves the issue immediately.
Error 27300 a critical installation failure that occurs when the installer cannot correctly register or start essential system drivers
. This error typically stems from corrupted OS cryptographic services, leftover files from previous versions, or conflicts with third-party software. Kaspersky Support Forum Core Causes OS Integrity Violations : Issues with Cryptographic Services catalog database for driver signature validation often prevent the klif.sys-x64 driver from being added to the system. Leftover Drivers
: Residual files or registry entries from a previous Kaspersky installation can block new drivers from installing. Third-Party Conflicts : Drivers from applications like VMware Workstation Cisco AnyConnect
use similar NDIS filter mechanisms and may conflict during the installation process. Unsupported Hardware : This error is common on systems using ARM (Snapdragon)
processors, which are not supported by standard Kaspersky versions. Step-by-Step Resolution 1. Clean Residual Files
Standard uninstallation often leaves behind fragments that cause driver errors.
Error 27300 when installing a Kaspersky application for home 20 Mar 2025 —
The Kaspersky Error 27300 typically occurs during installation when the system fails to register the klif.sys-x64 driver, which is the "Kaspersky Lab Intruder Filter". This driver is essential for the software's ability to intercept system events and block threats. Core Causes of Error 27300
Corrupted Registry/Driver Files: Residual files from a previous Kaspersky installation can block new drivers from being written.
System Integrity Issues: Failures in Windows Cryptographic Services or the "catroot2" database can prevent driver signature verification.
Third-Party Conflicts: Network-heavy applications like VPNs, VMware, or Cisco AnyConnect can conflict with Kaspersky’s NDIS filter.
OS Outdated: Missing Windows updates may mean your system lacks the root certificates needed to validate the installer's signature. Step-by-Step Solutions 1. Clean Residual Kaspersky Data
Standard uninstallation often leaves "ghost" drivers that cause Error 27300. Use the official Kavremover utility to purge all traces of previous versions. Run the tool as an Administrator.
Select the product you previously had (or let it auto-detect). Restart your computer before attempting a fresh install.
Error 27300 when installing a Kaspersky application for home
Solution 6: Update Windows and Drivers
Ensure your Windows operating system and drivers are up to date.
- Go to Settings.
- Click on "Update & Security."
- Click on "Windows Update."
- Follow the prompts to download and install any available updates.