If the remover tool doesn't fix the issue, you may need to manually delete the problematic driver service.
A: This error can actually affect any software that installs an NDIS filter driver. It appears with Kaspersky because it is one of the most popular security suites that uses this type of driver. The underlying cause is a conflict or corruption in a part of Windows that all NDIS filter drivers rely on.
Kaspersky requires specific core infrastructure elements to add filter profiles to your local Wi-Fi or Ethernet configurations. Press Win + R , type services.msc , and press . Scroll down to locate the Network Setup Service . Right-click the service and choose Properties . Set the Startup type option to Manual .
This technical guide breaks down why the klim6.sys driver fails and provides concrete, step-by-step solutions to clean your system and complete your Kaspersky installation. What is klim6.sys and Why Does it Fail?
Navigate to the following path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network In the right pane, look for a binary value named . kaspersky error installing driver klim6sys x64 upd
Kavremover deletes the problematic klim6.sys driver file from System32\drivers and removes all associated registry keys that cause version mismatch errors.
Once Windows boots, run the Kaspersky installer as an administrator immediately. 5. Reset the Windows Network Stack
Download the latest official utility via the Kaspersky Kavremover Tool Support Page. Boot your computer into . Right-click kavremover.exe and select Run as Administrator .
Do you have any or virtual machine tools currently active on your computer? If the remover tool doesn't fix the issue,
(Common on Windows 10/11)
Attempt a fresh installation. The error should be gone.
Re-enable these after Kaspersky installs successfully.
Locate the folder named and rename it to catroot2.old (Windows will automatically rebuild a fresh, uncorrupted version upon restart). Return to the Command Prompt and restart the service: net start cryptsvc Use code with caution. Step 4: Increase the Network Filter Driver Limit The underlying cause is a conflict or corruption
The core of the issue revolves around a critical file named (or its 64-bit variant, klim6.sys_x64). This file is the Kaspersky Anti-Virus NDIS Filter , a low-level network driver. Its primary function is to intercept network packets flowing between your computer and the internet. It uses a technology recommended by Microsoft called the "NDIS Intermediate Driver" to embed itself into the network stack of the operating system. This allows Kaspersky applications to scan web traffic, block malicious sites, and filter network activity in real time, providing a critical layer of protection.
Here’s a complete troubleshooting review for the error: on Windows 64-bit systems.
This comprehensive technical guide outlines why this error happens and provides a step-by-step framework to resolve it. Understanding the Role of klim6.sys
Once completed, do not just restart; perform a full , wait 30 seconds, and power on your PC normally. Step 2: Manually Clear Residual Services via Command Prompt
Type the following commands one by one, pressing after each: netsh winsock reset netsh int ip reset Close the command prompt and restart your computer. Prevention and Best Practices