Kaspersky Error 27300 - Klif.sys-x64

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 kavremover tool.
• 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.txt to 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.

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. kaspersky error 27300 klif.sys-x64

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

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 Here’s a general customer-style review for Kaspersky Error

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

to verify how many NDIS filter drivers are currently active on your system?

Error 27300 when installing a Kaspersky application for home

The error message "Kaspersky error 27300 klif.sys-x64" is a specific installation failure code that generally indicates a conflict between Kaspersky software and your system drivers or security policies.

Here is a breakdown of why this happens and the interesting technical details behind the file involved.

Solution 4: Disable Conflicting Software

If you have other security software installed, try disabling or uninstalling them, as they may be conflicting with Kaspersky antivirus.

1. Go to the Control Panel.
2. Click on "Programs and Features" (in Windows 10/8) or "Add/Remove Programs" (in Windows 7).
3. Find the conflicting software and click on it.
4. Click "Uninstall" or "Disable" to disable or uninstall the software.

Method 3: Disable Driver Signature Enforcement Temporarily

Windows may block klif.sys if signature verification fails. Disabling it allows the driver to load.

Steps:

1. Open Settings → Update & Security → Recovery.
2. Under Advanced startup, click Restart now.
3. When the blue screen appears: Troubleshoot → Advanced Options → Startup Settings → Restart.
4. After reboot, press 7 or F7 (“Disable driver signature enforcement”).
5. Install Kaspersky while in this mode.
6. Reboot normally – the driver will remain installed.

Solution 3: Run a System File Checker (SFC) Scan

1. Open Command Prompt as an administrator.
2. Type sfc /scannow and press Enter to run the scan.
3. Restart your computer after the scan is complete.

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.

How to Fix Kaspersky Error 27300 (klif.sys-x64) The Kaspersky Error 27300 typically occurs during the installation or upgrade of Kaspersky security products, such as Kaspersky Internet Security, Kaspersky Total Security, or Kaspersky Endpoint Security. This error indicates a failure to install a specific driver—most commonly klif.sys-x64 (Kaspersky Lightweight Inspection Framework)—which is critical for the software's real-time protection. Primary Causes of Error 27300 Title: Frustrating driver conflict – Error 27300 with

Several factors can trigger this driver installation failure:

Leftover Files: Traces of previous Kaspersky installations or other third-party security software can conflict with new drivers.

System File Corruption: Corrupted Windows system files or damaged cryptographic services can prevent drivers from being signed or registered.

Third-Party Conflicts: Network drivers from applications like VMware, Cisco AnyConnect, or WinPcap often conflict with Kaspersky’s NDIS filter.

Windows Update Issues: Missing critical OS updates or pending restarts can disrupt the driver installation process. Step-by-Step Solutions 1. Use the Kaspersky Kavremover Tool

Before attempting a fresh install, ensure all traces of previous versions are gone.

Download the kavremover tool from the official Kaspersky website.

Run the utility, select the product you are trying to install/remove, and follow the prompts. Restart your computer immediately after the tool finishes. 2. Clean the Windows Cryptographic Folders

If the error is related to digital signatures (often accompanied by code 0x8000ffff), you may need to reset the Windows Update catalog:

Error 27300 when installing a Kaspersky application for home

Step 3: Repair Windows System Files

Corrupted OS files can block driver registration.

1. Open Command Prompt as Administrator.
2. Run the System File Checker: sfc /scannow
3. Wait for the process to finish. If it finds errors, restart the computer.
4. If the error persists, run the DISM command: DISM /Online /Cleanup-Image /RestoreHealth

Method 8: Check Pending File Rename Operations

Stalled pending operations can block driver writes.

Use regedit to delete:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\PendingFileRenameOperations

If any value exists referencing klif.sys, delete the entire entry. Do not delete the key itself, only the values.