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.
Use Sysinternals or Process Explorer :
Open the , type cmd , right-click Command Prompt , and select Run as Administrator .
If you are attempting to install or update antivirus software—most commonly —and are met with a abrupt halt, you may be seeing this technical message: "Error 27300. Error installing driver klim6.sys_x64_exclusive." error 27300 error installing driver klim6sysx64 exclusive
Follow these structured technical procedures sequentially to resolve the driver conflict. Step 1: Perform a Clean Purge Using Kavremover
To solve the problem, it helps to understand the components involved:
Software that deeply integrates with network stacks—such as VMware Workstation , Cisco AnyConnect , VirtualBox , or WinPcap/Wireshark —can conflict directly with the Kaspersky NDIS filter. If you have another firewall or a VPN
Error 27300, specifically "Error installing driver klim6sysx64 exclusive", is a complex issue that requires a comprehensive approach to resolve. By understanding the possible causes, implications, and potential fixes, computer users can troubleshoot and potentially resolve this error. It is essential to maintain a systematic and methodical approach when attempting to fix this error, as incorrect or hasty solutions may exacerbate the problem. Ultimately, resolving Error 27300 can help ensure the stability, security, and performance of the computer system.
If it is missing, right-click an empty area, select , and name it MaxFilters .
Error 27300 is certainly an interruption, but it's a solvable one. The key is to systematically work through the potential causes—starting with a simple restart and cleanup with the kavremover tool, then moving on to system integrity checks like sfc /scannow and ensuring Windows is fully updated. For most users, these steps will clear the hurdle and allow the driver to install correctly, resulting in a successful Kaspersky installation. Error installing driver klim6
, McAfee, or older Kaspersky versions) may leave "ghost" drivers or registry entries that block new driver installation NDIS Filter Limit
Upload the .sys file or the installer to:
Type in your Windows search bar, right-click it, and Run as Administrator .
Corrupted registry entries governing network interfaces or protocols.
: Kaspersky has released patches for this specific bug. Ensure you are using the most recent installer from the Kaspersky Download Center Check for Driver Conflicts