Kaspersky Error 27300 Klif.sys-x64 -

Follow these steps in order. After each step, try reinstalling or updating Kaspersky again.

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.

Background services may lock driver installation. kaspersky error 27300 klif.sys-x64

Steps:

Here is the order of operations to resolve this. Start with #1 and move down.

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 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). Follow these steps in order

klif.sys is a critical kernel-mode driver used by all modern Kaspersky products. The -x64 suffix indicates it is the 64-bit version designed for Windows 64-bit operating systems.

Functions of klif.sys include:

Because this driver runs at the deepest level of Windows (Ring 0), Windows protects it rigorously. Any conflict with other security software, corrupted driver registries, or insufficient permissions can trigger error 27300.

If updating doesn't work, try uninstalling and reinstalling Kaspersky antivirus. This can help replace any corrupted files or registry entries.

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. Because this driver runs at the deepest level

The full error message often reads: