The file mentioned in the error, klif.sys, is a Kernel-Level Interceptor Filter driver.
If none of the above solutions work, it's best to contact Kaspersky support for further assistance. They can provide personalized help and guidance to resolve the issue.
Conclusion
The Kaspersky Error 27300: KLIF.SYS-X64 issue can be frustrating, but it's usually resolvable with some troubleshooting steps. By following the solutions outlined in this article, you should be able to resolve the error and get your Kaspersky antivirus software up and running smoothly. If you're still experiencing issues, don't hesitate to reach out to Kaspersky support for further assistance.
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 kaspersky error 27300 klif.sys-x64
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
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):
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:
Cons:
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.
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.
If you have other security software installed, try disabling or uninstalling them, as they may be conflicting with Kaspersky antivirus.
Insufficient permissions block driver writes.
Steps:
Error 27300 is often an MSI error. Repair the installer service.
Steps (as Administrator in Command Prompt):
msiexec /unregister
msiexec /regserver
net stop msiserver
net start msiserver
Then run the Kaspersky installer again.
Additionally, clear the MSI cache:
del /f /s /q %windir%\Installer\$PatchCache$
Error 27300 is a generic installation/uninstallation error code used by Kaspersky’s setup engine (based on the MSI installer framework). When accompanied by klif.sys-x64, it specifically points to a failure in loading, registering, or removing the KLIF (Kaspersky Lab Intermediate Filter) driver.
The full error message often reads:
Error 27300. Unable to load driver klif.sys-x64. Access is denied.
Or:
Error 27300. Unable to install driver klif.sys-x64. The system cannot find the file specified.
In some cases, the error appears during uninstallation, reading something like:
Error 27300. Unable to remove driver klif.sys-x64. The device is not ready.
This can happen if you have hardware-enforced driver blocking (e.g., HVCI – Hypervisor-protected Code Integrity). Disable Memory Integrity under Windows Security → Device Security → Core Isolation.
Error 27300 can also appear if the Windows Management Instrumentation (WMI) database is inconsistent. The file mentioned in the error, klif
The Fix: