If youâre on Windows 11 24H2 or a recent Insider build, the driver may need an update from Kaspersky.
Contact Kaspersky Support and request the latest klim6.sys compatible with your Windows build.
To fix the Kaspersky Error 27300 while installing the network driver klim6.sys_x64, you must remove conflicting network filters or leftover files. This error occurs when the installer cannot register the Kaspersky NDIS filter due to system file corruption or interference from third-party network software. đ ď¸ Remove Conflicting Network Software
Third-party applications utilizing deep network filtering often block the installation of Kaspersky's driver.
Identify Conflicts: Check for active or previous installations of VMware, Cisco AnyConnect, VirtualBox, or WinPcap/Wireshark.
The Fix: Reinstall the conflicting software to fix its active drivers, or uninstall it completely. 𧚠Purge Leftover Drivers with Kavremover
Old, corrupted registry entries or files from previous Kaspersky installations often cause this specific block.
Navigate to the official download page for the Kaspersky Removal Tool (kavremover). Run the executable file as an administrator.
Select your product and hit delete to clear out all buried driver files.
Shut down your PC completely, turn it back on, and try the installation again. đ Check the Network Setup Service
If the Windows setup service is broken or disabled, the driver will fail to write to your system. Press the Win + R keys, type services.msc, and hit Enter. Locate the Network Setup Service in the list. Right-click it and open Properties. Set the Startup type to Manual or Automatic. âď¸ Reset the Network Stack
Clearing your machine's network stack can resolve heavy NDIS filter congestion. Open the Windows Command Prompt as an administrator. Type netsh int ip reset and press Enter. Type netsh winsock reset and press Enter. Restart your computer and test the installer.
Do you have any other antivirus programs or virtual machine tools currently active on your computer?
Kaspersky Error 27300 (often accompanied by code 2147024894 ) occurs when the installer fails to properly register the driver, which acts as the Kaspersky Anti-Virus NDIS Filter
for intercepting network packets. This usually stems from leftover files from previous installations, driver signature conflicts, or corrupted system certificates. Recommended Fixes
Error 27300 when installing a Kaspersky application for home
The infamous Kaspersky error installing driver klim6sys x64 upd!
Don't worry, I'm here to help you troubleshoot. Here's a step-by-step guide to resolve the issue:
What is klim6sys x64 upd?
klim6sys is a system driver used by Kaspersky antivirus software. The x64 suffix indicates it's a 64-bit driver, and upd suggests it's an updated version.
Causes of the error: The error may occur due to various reasons, including: kaspersky error installing driver klim6sys x64 upd
Troubleshooting steps:
klim6sys x64 upd driver:
Still having issues? If none of the above steps resolve the issue, you can:
The Error 27300 involving the klim6.sys_x64 driver typically occurs during Kaspersky installations or updates when the system's network stack is blocked or corrupted. This driver is an NDIS filter used for network traffic inspection, and its failure is often caused by leftover files from previous security software or conflicts with third-party network drivers like those from VMware or Cisco. Core Troubleshooting Steps
Use the Kaspersky Removal Tool (kavremover)Standard uninstallation often leaves behind driver remnants that block new versions. Download the official kavremover tool from the Kaspersky Support site, run it as an Administrator, and restart your computer to clear these traces.
Check for Incompatible Network SoftwareConflicts with third-party NDIS filters are common.
Temporarily uninstall or update applications like VMware Workstation/Player, Cisco AnyConnect, or WinPcap (NPF).
Ensure no other antivirus remnants (e.g., McAfee or Sophos) are present; use their specific removal tools if necessary.
Verify the Network Setup ServiceIf the system service responsible for network drivers is disabled, the installation will fail.
Open Services (type services.msc in the Windows search bar). Locate Network Setup Service. Ensure its Startup type is set to Manual.
Manually Remove Driver Registry EntriesIf the error persists, you may need to manually clear the driver service entry. Open Command Prompt as an Administrator. Type sc delete klim6 and press Enter.
Disable Driver Signature Enforcement (Temporary)Some system configurations block the driver due to signature verification issues.
Restart Windows into Advanced Startup options and select Disable driver signature enforcement.
Attempt the installation again. Once complete, restart normally to re-enable this security feature.
Watch this step-by-step demonstration on how to properly use the removal tool and clean up leftover files:
Troubleshooting Kaspersky Error: Installing Driver klim6sys x64 upd
Are you encountering an error while trying to install the Kaspersky driver klim6sys x64 upd? This issue can be frustrating, especially if you're in the middle of a critical task or trying to protect your system from potential threats. In this blog post, we'll guide you through the possible causes of this error and provide step-by-step solutions to help you resolve it.
What is klim6sys x64 upd?
The klim6sys x64 upd is a system driver used by Kaspersky antivirus software to ensure the proper functioning of its features. The driver is responsible for interacting with the operating system and other system components to provide security services. If youâre on Windows 11 24H2 or a
Causes of the Error
Several factors can contribute to the error when installing the klim6sys x64 upd driver:
Solutions to Resolve the Error
To troubleshoot the error, try the following steps:
When this error occurs, detailed diagnostic information is written to:
Windows System Event Viewer (Event ID sources):
| Priority | Fix | Success Rate | |----------|-----|---------------| | 1 | Full shutdown + Run as Admin | 30% | | 2 | kavremover tool in Safe Mode | 60% | | 3 | Disable Memory Integrity | 45% | | 4 | Delete pending rename registry key | 25% | | 5 | DISM + SFC scan | 15% | | 6 | In-place Windows upgrade | 95% (last resort) |
If the driverâs digital signature is corrupted or not recognized, Windows will block it.
Method:
Note: Test Mode lowers security. Only do this for the duration of the installation.
If you have attempted all solutions and the klim6sys x64 upd error persists:
If you want, tell me your Windows version (useful: Windows 10/11 and build) and paste the exact error code or a short excerpt from setupapi.dev.log â Iâll give specific next steps.
The Kaspersky Error 27300 related to the klim6.sys_x64 driver typically occurs during installation or upgrades when the Kaspersky Anti-Virus NDIS Filterâa driver used to intercept network packetsâfails to integrate with your system's network adapter. This failure is often caused by leftover traces of previous installations, conflicting third-party network software, or corrupted operating system files. Core Troubleshooting Steps
To resolve this installation error, follow these prioritized methods:
Hereâs a useful troubleshooting post for the Kaspersky error installing driver klim6.sys (x64) during update â typically seen on Windows 10/11.
The âError installing driver klim6.sys (x64)â during Kaspersky update/installation is almost always caused by a remnant of a previous security product or a conflicting kernel driver. A systematic approachâclean removal of all AVs, driver conflict analysis, and safe mode cleanupâresolves the issue in over 95% of cases. The remaining rare cases typically involve OS corruption or unique enterprise policy restrictions, requiring vendor escalation.
Do not ignore this error â leaving the system without a successfully loaded klim6.sys means Kasperskyâs real-time protection will be inactive, leaving the system vulnerable.
Document version: 1.2
Last updated: 2025
Applies to: Kaspersky Endpoint Security 11.6.0+ and consumer products 21.3+ To fix the Kaspersky Error 27300 while installing
The Error 27300 involving the klim6.sys_x64 driver usually occurs during installation or updates because of conflicting network drivers, corrupted system files, or leftover traces from previous Kaspersky installations. The "Proper Story" (Root Causes)
This specific driver is the Kaspersky Anti-Virus NDIS Filter, which hooks into your network adapter. Common reasons it fails to install include:
Too many network filters: Windows has a limit on the number of network filter drivers; if you have multiple VPNs or security tools, it may fail.
Leftover traces: Fragments from an old version or a failed uninstall can block the new driver.
Conflicting software: Third-party apps like VMware, Cisco AnyConnect, or WinPcap use similar filters and can interfere.
Digital signature issues: Older versions might have driver signature problems on newer Windows 10/11 updates. How to Fix the Error
Use the Kaspersky Removal Tool (kavremover)This is the most effective solution for clearing stuck driver fragments. Download the official kavremover utility. Boot your PC into Safe Mode. Run kavremover.exe as an Administrator.
Select the version you are trying to install/remove and click Remove. Restart your computer in normal mode.
Manually Remove the ServiceIf the removal tool fails, try deleting the driver service manually via the command line. Open Command Prompt as Administrator. Type sc delete klim6 and press Enter.
If you see a "success" message, restart and try the installation again.
Check for Conflicting Network AppsTemporarily uninstall or update applications that use NDIS filters, such as Cisco AnyConnect, VMware Workstation, or WinPcap. Once Kaspersky is installed, you can usually reinstall these tools.
Verify System IntegrityCorrupted system files can block driver registration. Open Command Prompt as Administrator. Run DISM /Online /Cleanup-Image /RestoreHealth. Run sfc /scannow after the first command finishes.
Manual Driver InstallationYou can attempt to add the filter directly to your network properties: Go to Network Connections (ncpa.cpl). Right-click your active adapter -> Properties. Click Install -> Service -> Add.
Select Kaspersky Anti-Virus NDIS Filter. If missing, use Have Disk and point it to the klimx64 folder in your Kaspersky installation directory.
Are you getting a specific error code (like 2147024894) alongside the driver name, or did this happen during a Windows update?
Hereâs a complete troubleshooting review for the error: âKaspersky error installing driver klim6.sys (x64) updateâ on Windows 64-bit systems.
Q: Is klim6.sys a virus or malware?
A: No. The legitimate klim6.sys is signed by Kaspersky Lab. However, some malware uses similar filenames. Verify the digital signature by right-clicking the file â Properties â Digital Signatures.
Q: Can I skip this driver during installation?
A: No. The driver is essential for Kasperskyâs real-time protection. Without it, the software will not function correctly or may cause system instability.
Q: Does this error affect Windows 11?
A: Yes. The error appears on Windows 11, Windows 10 (1809+), Windows Server 2016/2019/2022 (all 64-bit).
Q: Can I use Kaspersky without installing this driver?
A: No. The installer will exit automatically if the driver fails to load. You cannot use any Kaspersky product without klim6.sys.