27300 Error Installing Driver Klim6sysx64 Exclusive — Error

Report generated for diagnostic reference. Use official vendor tools where available.

If successful, restart your computer and attempt the installation again. Kaspersky Support Forum 3. Update Network Stack Drivers Conflicts with third-party network software are common. Update or Reinstall

Type the following command and press Enter to stop the driver service: sc stop klim6

If the automated tool fails, you may need to manually kick the driver out of your network configuration. Right-click the button and select Device Manager . error 27300 error installing driver klim6sysx64 exclusive

The klim6.sys file is an NDIS (Network Driver Interface Specification) filter driver. Kaspersky uses it to intercept and scan network traffic for malicious activity before it reaches your operating system. When the Windows Network Setup Service or Cryptographic subsystem blocks this driver from locking onto your network adapters exclusively, the installer crashes with Error 27300. The main triggers for this failure include:

The Windows Network Setup Service must be active for driver registration: Press Win + R , type services.msc , and press Enter . Locate Network Setup Service . Ensure the "Startup type" is set to Manual or Automatic .

When the list appears, press or F7 to Disable driver signature enforcement . Once the computer restarts, run the installer. Still Having Issues? Report generated for diagnostic reference

Remaining files from old versions are the most frequent cause of driver installation failures.

(e.g., Kaspersky Internet Security, Total Security) are you installing? Are you installing new or updating an existing one? What Windows version (10 or 11) are you using? This will help me give you more precise steps.

Open Command Prompt as Administrator . Step 2: Stop the service if it exists: sc stop klim6 sc delete klim6 Step 3: Navigate to the drivers folder: cd C:\Windows\System32\drivers Step 4: Take ownership of the file: takeown /f klim6.sys icacls klim6.sys /grant administrators:F Step 5: Delete the file: del klim6.sys (If it says "access denied," proceed to Method 4.) Step 6: Reboot and retry installation. Kaspersky Support Forum 3

The file is Kaspersky 's proprietary Anti-Virus NDIS Filter driver, which manages network interception, firewall configurations, and web traffic filtering. When Windows marks this driver installation as "exclusive" or blocked, it means a conflict in the Network Operating System layer or a corrupted cryptographic repository is stopping the driver registration. Root Causes of Error 27300

Right-click on and select Run as administrator . Type sfc /scannow and press Enter. Wait for the scan to complete and restart your computer. 4. Update Network Adapter Drivers