Kaspersky Error Installing Driver Klim6sys X64 Upd ⚡

In enterprise environments, Group Policy may block third-party drivers.

Right-click the Kaspersky setup file (e.g., setup.exe or kaspersky4.exe) → Run as administrator. Standard user accounts often lack permission to load kernel-mode drivers.

The driver klim6.sys (Kaspersky Lab Intermediate Minifilter Driver) is a kernel-mode file system filter driver. It loads early during boot or during installation and intercepts all file I/O operations for real-time protection.

The error can be triggered by one or more of the following underlying causes:

Fixing the "Kaspersky Error Installing Driver klim6.sys x64"

If you are trying to install or update Kaspersky Lab products—like Kaspersky Internet Security, Total Security, or the new Kaspersky Standard/Plus—and you are hit with an error regarding klim6.sys, you aren't alone. This specific driver is the Kaspersky Anti-Virus Network Filter, and it is notorious for causing installation "rollbacks" or "Error 1310/1603" messages on 64-bit Windows systems.

This error usually stems from a conflict with a previous installation, leftover driver fragments, or Windows holding onto a locked file that the installer cannot overwrite. Here is how to fix it and get your protection back up and running. 1. Use the Kaspersky Products Removal Tool (Kavremover) kaspersky error installing driver klim6sys x64 upd

A standard uninstall through the Control Panel often leaves the klim6.sys driver behind in the Windows drivers folder. Kaspersky provides a specialized utility called Kavremover to wipe these stubborn leftovers.

Download the kavremover.exe from the official Kaspersky support website.

Boot your computer into Safe Mode (this is crucial, as it prevents the driver from being "in use").

Run the tool, select the Kaspersky version you were trying to install, and click Remove.

Restart your computer normally and attempt the installation again. 2. Manually Delete the Driver File

If the removal tool fails, you may need to take manual control of the file system. Navigate to C:\Windows\System32\drivers. Look for a file named klim6.sys. If you find it, right-click and Delete it. Right-click the Kaspersky setup file (e

Note: If Windows says the file is in use, you must do this in Safe Mode.

Check C:\Windows\SysWOW64\drivers as well (though it is primarily an x64 driver, leftovers can hide here). Try the installation again. 3. Clear the Filter Drivers in the Registry

Sometimes the "UpperFilters" or "LowerFilters" in the Windows Registry still point to the klim6 driver, causing the installer to think it’s already active. Press Win + R, type regedit, and hit Enter.

Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\4d36e972-e325-11ce-bfc1-08002be10318.

In the right pane, look for UpperFilters. If you see klim6 listed there, right-click and Modify to remove only that specific name, leaving other values (like netvsc) intact.

Warning: Modifying the registry can be risky. Always export a backup of the key before changing it. 4. Reset Network Adapters Right-click the Kaspersky setup file (e.g.

Because klim6.sys is a network filter driver, it attaches itself to your Network Interface Card (NIC). If the driver is "stuck," resetting your network stack can help. Open Command Prompt as Administrator. Type netsh winsock reset and press Enter. Type netsh int ip reset and press Enter. Restart your PC. 5. Disable Third-Party Firewalls or VPNs

If you have other security software or a VPN (like NordVPN, ExpressVPN, or Malwarebytes) installed, their own network drivers might be locking the network stack, preventing Kaspersky from "hooking" its driver into the system. Temporarily uninstall these programs, install Kaspersky, and then reinstall them afterward.

The klim6.sys x64 error is almost always a "file in use" or "access denied" issue. By using the Kavremover tool in Safe Mode, you eliminate 90% of the causes. If the problem persists, checking the System32/drivers folder and cleaning the Registry are your best bets for a clean install.

The error installing driver klim6.sys_x64 (often accompanied by Error 27300

) occurs when the Kaspersky NDIS filter driver fails to integrate with your network stack during installation or update. This typically stems from leftover files from previous antivirus versions, corrupted system certificates, or network service malfunctions. Core Troubleshooting Steps