Error 27300 Error Installing Driver Klim6sysx64 Exclusive Jun 2026

If you have another firewall or a VPN (like NordVPN, AnyConnect, or OpenVPN) active, their drivers might be competing for "exclusive" access to the network stack.

Automatic diagnostics (one-click)

: Applications that utilize deep virtualization bridges—such as VMware Workstation, Cisco AnyConnect, or WinPcap—can lock down or corrupt network adapters. error 27300 error installing driver klim6sysx64 exclusive

If a previous version of the driver is locked, you can force its deletion via the command line. Command Prompt as an Administrator. Run the command: sc delete klim6

: Traces of previous Kaspersky installations or other antivirus software (e.g., McAfee) can block the new driver from installing. If you have another firewall or a VPN

The file klim6.sys is the . This driver operates at the Network Driver Interface Specification (NDIS) layer, allowing the security software to intercept, scan, and filter network traffic for malicious activity before it reaches the operating system.

Leftover drivers or registry keys from previous installations of Kaspersky or other antivirus programs (like McAfee or Sophos ). Command Prompt as an Administrator

When the installer displays this error, it means it cannot load, register, or overwrite this specific driver file. This is often caused by:

Do not restart your computer yet. Run these deployment image servicing commands to fix core system corruption: DISM.exe /Online /Cleanup-image /Restorehealth sfc /scannow Use code with caution. Once the system scan finishes, restart your computer. Step 5: Check Device Manager for Ghost Network Adapters

This comprehensive troubleshooting guide breaks down the core causes of this error and provides a sequence of actionable solutions to resolve the issue entirely. Why Does Error 27300 Occur?