Error 27300 Error Installing Driver Klim6sysx64 Exclusive Jun 2026

The most common causes for this specific failure are:

is a native Windows Installer (MSI) error that typically indicates a kernel-mode driver installation failure. When paired with the string "exclusive" and the driver name klim6sysx64 , this report confirms a critical conflict: the Windows operating system cannot overwrite, replace, or register the driver because a running process, security service, or the driver itself has an exclusive lock on the target system file or registry path.

: Traces of older Kaspersky builds or previous security tools (like Sophos, McAfee, or Norton) block the path. error 27300 error installing driver klim6sysx64 exclusive

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 have other security software installed, it might conflict with Kaspersky. Temporarily disable or uninstall other security software and then try to install Kaspersky. The most common causes for this specific failure

Interference from third-party network drivers like VMware Workstation, Cisco AnyConnect, or WinPcap. System Integrity Issues:

In some cases, manually installing the driver might resolve the issue: The error indicates that the installer failed to

The debugger spat out a hex log, but one line stood out in red: STATUS_ACCESS_DENIED . But it wasn't the OS denying access. The call stack originated from a hardware interrupt.

This driver acts as a low-level filter driver. It sits between Windows file system requests and the hardware, scanning every file that is opened, executed, or modified. Because it operates at the kernel level, Windows places strict locks on it. If any other process holds a lock on the driver file or its registry keys, the installation fails with the "exclusive" error.

When the list of options appears, press or F7 on your keyboard to select Disable driver signature enforcement . Once Windows boots, try to install Kaspersky again. Method 4: Clear the catroot2 Folder

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