Kaspersky Error Installing Driver Klim6sys X64 Upd May 2026

Kaspersky provides a dedicated tool to scrape every last trace of its drivers from the registry and file system.

Step-by-step:

After removal: Attempt a fresh installation. The error should be gone.

The “Error installing driver klim6.sys (x64)” during Kaspersky update/installation is almost always caused by a remnant of a previous security product or a conflicting kernel driver. A systematic approach—clean removal of all AVs, driver conflict analysis, and safe mode cleanup—resolves the issue in over 95% of cases. The remaining rare cases typically involve OS corruption or unique enterprise policy restrictions, requiring vendor escalation.

Do not ignore this error – leaving the system without a successfully loaded klim6.sys means Kaspersky’s real-time protection will be inactive, leaving the system vulnerable.

Document version: 1.2
Last updated: 2025
Applies to: Kaspersky Endpoint Security 11.6.0+ and consumer products 21.3+

Understanding and Resolving the Kaspersky Error 27300 (klim6.sys)

The "Kaspersky error installing driver klim6.sys x64" is a technical hurdle typically accompanied by Error Code 27300. This error occurs when the Kaspersky installer fails to integrate the klim6.sys driver, which acts as an NDIS (Network Driver Interface Specification) filter responsible for intercepting and analyzing network traffic. Because this driver operates at a deep system level, its failure often stems from underlying conflicts with the operating system or other software. Primary Causes of the Error

The failure to install this specific driver is rarely a random event; it is usually triggered by specific system conditions:

Software Conflicts: The most frequent cause is the presence of other security software or leftover remnants from a previous antivirus installation. Programs that use similar NDIS filters, such as VMware, Cisco AnyConnect, or WinPcap, can also block the driver from binding to the network adapter. kaspersky error installing driver klim6sys x64 upd

Outdated Operating System: If Windows is not fully updated, required system components or digital certificates may be missing, preventing the secure installation of new kernel-mode drivers.

System File Corruption: Damaged Windows system files, particularly those related to the driver catalog (such as the catroot2 folder), can prevent the OS from recognizing or verifying the new driver.

Filter Limit Exceeded: Windows has a built-in limit on the number of network filter drivers that can be active simultaneously. If this limit is reached by other software, the Kaspersky driver cannot be added. Effective Troubleshooting Strategies

To resolve this issue, you must systematically clear these bottlenecks:

Error 27300 when installing a Kaspersky application for home

The Error 27300 involving the klim6.sys_x64 driver typically occurs during Kaspersky installations or updates when the system's network stack is blocked or corrupted. This driver is an NDIS filter used for network traffic inspection, and its failure is often caused by leftover files from previous security software or conflicts with third-party network drivers like those from VMware or Cisco. Core Troubleshooting Steps

Use the Kaspersky Removal Tool (kavremover)Standard uninstallation often leaves behind driver remnants that block new versions. Download the official kavremover tool from the Kaspersky Support site, run it as an Administrator, and restart your computer to clear these traces.

Check for Incompatible Network SoftwareConflicts with third-party NDIS filters are common.

Temporarily uninstall or update applications like VMware Workstation/Player, Cisco AnyConnect, or WinPcap (NPF). Kaspersky provides a dedicated tool to scrape every

Ensure no other antivirus remnants (e.g., McAfee or Sophos) are present; use their specific removal tools if necessary.

Verify the Network Setup ServiceIf the system service responsible for network drivers is disabled, the installation will fail.

Open Services (type services.msc in the Windows search bar). Locate Network Setup Service. Ensure its Startup type is set to Manual.

Manually Remove Driver Registry EntriesIf the error persists, you may need to manually clear the driver service entry. Open Command Prompt as an Administrator. Type sc delete klim6 and press Enter.

Disable Driver Signature Enforcement (Temporary)Some system configurations block the driver due to signature verification issues.

Restart Windows into Advanced Startup options and select Disable driver signature enforcement.

Attempt the installation again. Once complete, restart normally to re-enable this security feature.

Watch this step-by-step demonstration on how to properly use the removal tool and clean up leftover files:

While many programs can cause this, the following are the most frequent culprits: After removal: Attempt a fresh installation

The infamous Kaspersky error installing driver klim6sys x64 upd!

Don't worry, I'm here to help you troubleshoot. Here's a step-by-step guide to resolve the issue:

What is klim6sys x64 upd? klim6sys is a system driver used by Kaspersky antivirus software. The x64 suffix indicates it's a 64-bit driver, and upd suggests it's an updated version.

Causes of the error: The error may occur due to various reasons, including:

Troubleshooting steps:

Still having issues? If none of the above steps resolve the issue, you can:

Corrupted system files can prevent the driver from registering correctly.

Steps: