Error 27300 Error Installing Driver Klim6sysx64 Exclusive «2026 Release»

If you would like more tailored advice, let me know you are currently running, if you have any active VPNs or VMs installed, or the specific numerical error code that follows the 27300 message. Share public link

: Issues with the Windows Cryptographic Services or the driver catalog database (catroot2) can prevent digital signature verification.

: In some cases, other VPNs or firewall software with their own NDIS filters (like OpenVPN or Cisco AnyConnect) can cause "exclusive" access errors. Try temporarily disabling or uninstalling these before the Kaspersky setup. Technical Summary Error Code (Kaspersky Lab Interceptor and Masker) Primary Target Windows 10 / Windows Server Resolved in latest builds (March 2025) Are you seeing this error on a personal PC remote server

: Files from previous installations of Kaspersky or other antivirus programs (e.g., McAfee, Sophos ) remaining in system32 . error 27300 error installing driver klim6sysx64 exclusive

Standard Windows uninstallation often leaves old filter drivers bound to your network adapters.

The klim6sysx64.sys file is an NDIS Intermediate Miniport Driver associated with Kaspersky Lab. It acts as a bridge between your network adapter and the security software to filter network traffic for malicious threats.

The error is often triggered by remnants of previous security software or conflicts within the Windows networking stack: Leftover Drivers : Uninstalled antivirus programs (like If you would like more tailored advice, let

. This often happens because another application or a leftover driver currently has exclusive access

The error indicates that the installer failed to register or bind Kaspersky’s network filter driver ( klim6.sys ) to your system's network adapters. This comprehensive guide explains why this error happens and provides step-by-step solutions to resolve it. Understanding Error 27300 and klim6.sys

If you are trying to resolve this error on a specific machine, it would help to narrow down the cause. Could you tell me: Which are you currently running? Try temporarily disabling or uninstalling these before the

If it is missing, right-click an empty area, select , and name it MaxFilters .

If a reboot and Windows update don't solve the problem, follow these solutions in order. They are arranged from least to most invasive.

If you use platforms like , temporarily uninstall them.

This error typically occurs during the installation of (or other security tools utilizing the klim6 driver) on a Windows operating system. The word "exclusive" in the error message is the key to the puzzle. It indicates that the installer attempted to load a kernel driver, but Windows denied access because the driver is already in use, locked by another process, or blocked due to security policies.

Since klim6sysx64 is a network driver, an outdated network card driver can cause conflicts. Right-click Start, select . Expand Network adapters . Right-click your network adapter and select Update driver . 5. Disable Driver Signature Enforcement (Temporary)