Kaspersky Error 27300 Klif.sys-x64 ✯ | Direct |

This error is rarely random; it is usually caused by one of three specific conflicts:

A. Memory Integrity (Core Isolation) This is the most modern cause. Windows 10 and 11 have a feature called Core Isolation (part of Windows Security) that uses virtualization to protect the core kernel.

B. Remnants of Old Antivirus If you previously had a different antivirus (like Norton, McAfee, or even an older version of Kaspersky), leftover registry keys or filter drivers can block the new klif.sys from attaching to the file system stack.

C. Corrupted Download A partial download or a corrupted installer package can lead to the system trying to load a malformed driver file. kaspersky error 27300 klif.sys-x64

The System File Checker (SFC) tool can help repair corrupted system files.

If you are deploying via an enterprise console and the GUI keeps failing, you can bypass the GUI error by installing the driver manually via the command line.

The Fix (Proceed with caution):

Follow these steps in order to resolve the installation failure.

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.

If you are a Kaspersky user—whether running Kaspersky Internet Security, Kaspersky Total Security, Kaspersky Endpoint Security, or Kaspersky Free Antivirus—you might have encountered a frustrating roadblock during installation, update, or uninstallation: Kaspersky error 27300. This error is almost always accompanied by the specific driver reference klif.sys-x64. This error is rarely random; it is usually

This error can prevent you from installing, removing, or properly running Kaspersky products. It can also trigger system instability, blue screens, or failure of real-time protection. The good news is that this error is well-documented, and solutions exist—from simple driver fixes to advanced system modifications.

In this long-form guide, we will explore what error 27300 means, why the klif.sys-x64 driver is critical, what causes the problem, and how to fix it step-by-step on Windows 10 and Windows 11 (64-bit systems).