If the removal tool fails, you may need to manually delete the problematic service entry: Command Prompt as an Administrator. sc delete klim6
If the error persists, Windows may have trouble verifying the driver's digital signature due to file corruption. Open the as an Administrator. Run the System File Checker command: sfc /scannow . Additionally, run the DISM tool to repair the system image: DISM.exe /Online /Cleanup-image /Restorehealth . Restart your device after these commands finish.
netcfg -d (This performs a heavy reset of all network settings) netsh winsock reset netsh int ip reset Restart your computer. 4. Check for Third-Party Firewall Conflicts
If you are trying to install or update Kaspersky antivirus software and encounter the dreaded you are not alone. This is a common, frustrating issue where Kaspersky’s NDIS network filter driver fails to load properly, often accompanied by the message that the driver is in an "exclusive" state or blocked. error 27300 error installing driver klim6sysx64 exclusive
This workaround can bypass verification checks that might be blocking the installation. It should only be used temporarily and re-enabled immediately afterward.
To solve the problem, it helps to understand the components involved:
: Traces of previous antivirus solutions or old Kaspersky network filters still occupy the network stack. If the removal tool fails, you may need
"Error 27300. Error installing driver 'klim6sysx64' (exclusive)."
Applications using custom virtual network adapters—such as VMware Workstation, Cisco AnyConnect, or WinPcap—frequently clash with the klim6.sys driver deployment.
Another program is blocking the driver installation. Run the System File Checker command: sfc /scannow
: If you use VMware or Cisco AnyConnect, try reinstalling them. This can sometimes refresh the NDIS filter stack and allow the new driver to register. Check Services : Ensure the Network Setup Service is present and set to startup in Windows Services ( services.msc 4. System File Repair
When an MSI-based installer reaches the stage, it attempts to:
(do not choose 'Restart'), then boot normally. 2. Clear Existing Network Stack Registry Blocks