Here’s a complete troubleshooting review for the error: “Kaspersky error installing driver klim6.sys (x64) update” on Windows 64-bit systems.
The “Error installing driver klim6.sys (x64)” during Kaspersky update/installation is almost always caused by a remnant of a previous security product or a conflicting kernel driver. A systematic approach—clean removal of all AVs, driver conflict analysis, and safe mode cleanup—resolves 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 – leaving the system without a successfully loaded klim6.sys means Kaspersky’s 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+
When the "Error 27300" interrupts your Kaspersky installation, it's usually because the driver—the engine behind the Kaspersky NDIS 6 Filter
—is being blocked by digital signature issues, leftover driver fragments, or conflicting network software.
Here is a troubleshooting story to guide you through the most effective fixes: 1. The "Ghost Driver" Cleanup
Often, a previous version didn't leave cleanly. You must use the official kavremover tool to scrub the system. Run it in Safe Mode
: This ensures no active processes protect the leftover files. Force-Delete the Service : Open Command Prompt as Administrator and run: sc delete klim6 . This clears the way for a fresh driver registration. 2. The Registry Reset (Windows 7/8 Users)
For older systems, the network configuration registry can become "stuck." Registry Editor Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network parameter and rename it to your computer and try the installation again. 3. The Manual Driver Handshake
If the installer keeps failing, you can sometimes bypass it by installing the driver yourself: Locate the
file (often found in the extracted installation folder or temporary files). Right-click it and select
Once Windows confirms the driver is added, restart the main Kaspersky installation. 4. Overcoming Signature Blocks If your error code is 2146500025 , Windows may be rejecting the driver's digital signature.
involving the klim6.sys_x64 driver typically occurs during installation or updates when there are leftover driver fragments, conflicting network software, or corrupted system certificates. Kaspersky Support Forum Quick Fixes & Preparations Verify Requirements
: Ensure your OS is supported. This error often occurs on unsupported ARM-based processors (like Snapdragon). Save Activation Codes
: Before removing software, ensure your activation code is saved to your My Kaspersky account Update Windows
: Ensure all pending Windows Updates are installed, as missing root certificates can disrupt driver signing. Kaspersky Support Forum Step-by-Step Resolution Guide 1. Clean Removal of Previous Versions
Standard uninstalls often leave driver traces that block new installations. Download the official kavremover tool Boot your computer into kavremover.exe Administrator Select the installed product from the dropdown and click
the computer (do not just restart), then power it back on normally. Kaspersky Support Forum 2. Clear Conflicting Network Drivers
driver is an NDIS filter. Conflicts with other network-heavy software can cause it to fail. Known Conflicts : Temporarily uninstall or update programs like VMware Workstation Cisco AnyConnect Manual Driver Deletion Open Command Prompt as an Administrator. sc delete klim6
and press Enter. This removes any stuck service definitions. Kaspersky Support Forum 3. Fix System Corruptions kaspersky error installing driver klim6sys x64 upd
If the issue persists, your Windows driver catalog or Base Filtering Engine might be damaged. Repair System Files sfc /scannow
in an Administrator Command Prompt to fix corrupted OS files. Reset Driver Catalog
: If Windows Updates are failing alongside this error, you may need to reset the folder by stopping the service and renaming the folder. 4. Registry Adjustment (Windows 7/8 Only) If you are on an older OS: Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network Rename the parameter to and restart. Final Installation Attempt
Error 27300 when installing a Kaspersky application for home
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. 🛠️ 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. 🧹 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. 🌐 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. ⚙️ 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?
Here’s a useful troubleshooting post for the Kaspersky error installing driver klim6.sys (x64) during update — typically seen on Windows 10/11.
klim6.sys without booting into Safe Mode – file is protected.Try updating the klim6sys x64 upd driver:
If quick fixes fail, the problem is almost certainly a driver conflict or stale file.
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.
fltmc filters370030 for Kaspersky’s typical altitude).360000) is using the same altitude range, uninstall that product.fltmc unload <filter_name> (e.g., fltmc unload wdFilter for Microsoft Defender).Conclusion
The "Kaspersky error installing driver klim6sys x64 upd" can be a challenging issue to resolve, but by following these troubleshooting steps, you should be able to overcome the problem. If you're still experiencing issues, consider contacting Kaspersky support for further assistance. Remember to always keep your antivirus software up-to-date to ensure your system's security and protection.
Additional Tips
By following this comprehensive guide, you should be able to resolve the klim6sys x64 upd driver installation error and get your Kaspersky antivirus software up and running smoothly.
Fix: Kaspersky Error 27300 Installing Driver klim6.sys x64 The Error 27300 when installing a Kaspersky application usually occurs because the system fails to install the klim6.sys (x64) driver. This driver is the Kaspersky Anti-Virus NDIS Filter, which intercepts network packets for security scanning. Common causes include leftover files from previous installations, incompatible third-party drivers (like VMware or Cisco AnyConnect), or a corrupted Windows driver catalog. Quick Fixes
Connect a Keyboard: Surprisingly, this error can occur on servers if a physical keyboard is not connected during installation.
Run as Administrator: Right-click the installer and select Run as Administrator to ensure it has the required permissions to modify system drivers.
Update Your OS: Ensure Windows is fully updated, as missing root certificates or system file corruption can block driver signing. Step 1: Complete Removal of Previous Installations
One of the most persistent issues users encounter when setting up or updating Kaspersky security software is Error 27300, often specifically citing a failure to install the klim6.sys_x64 driver. This driver acts as the "Kaspersky Anti-Virus NDIS Filter," an essential component that intercepts network packets to protect your device from online threats.
If your installation is repeatedly failing with this error, it is typically due to leftover files from previous versions, conflicting third-party network drivers, or corrupted system registry keys. 1. Perform a Clean Uninstall with Kavremover
The most frequent cause is "ghost" drivers from a previous Kaspersky installation that didn't clear out properly. Standard Windows uninstallation often leaves behind registry entries that block new driver updates. Download the official Kaspersky Kavremover tool.
Run the utility to strip all traces of previous Kaspersky products.
Restart your computer immediately after the process finishes. 2. Manual Removal via Command Prompt
If the remover tool doesn't fix the issue, you may need to manually delete the problematic driver service.
Search for cmd in your Start menu, right-click it, and select Run as Administrator. Type the following command and press Enter:sc delete klim6
If you receive a success message, try restarting the Kaspersky installer. 3. Check for Conflicting Network Software
Because klim6.sys is a network filter driver, it often conflicts with other software that uses similar technology, such as VPNs or virtual machine software.
Known Conflicts: Common culprits include VMware Workstation, Cisco AnyConnect, and WinPcap.
Solution: Temporarily uninstall these applications, complete the Kaspersky installation, and then reinstall them afterward. This allows the Kaspersky NDIS filter to seat correctly first. 4. Reset the Network Configuration (Windows 7/8/10)
If you are on an older version of Windows or have a corrupted network stack, a registry tweak can sometimes bypass the "too many filters" limitation. Open the Registry Editor (type regedit in the Run prompt).
Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network. Find the Config parameter and rename it to Config2. Restart your PC and try the installation again. Here’s a complete troubleshooting review for the error:
The Kaspersky Error 27300 related to the klim6.sys_x64 driver typically occurs during installation or upgrades when the Kaspersky Anti-Virus NDIS Filter—a driver used to intercept network packets—fails 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:
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:
klim6sys x64 upd driver might be outdated or incompatible with your system configuration.Troubleshooting steps:
sfc /scannow and press Enter.sfc /offwindir:C:\Windows\winsxs to repair them.klim6sys x64 upd driver:
msconfig, and press Enter.Still having issues? If none of the above steps resolve the issue, you can:
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
Understanding and Resolving the Kaspersky Error 27300 (klim6.sys)
The "Kaspersky error installing driver klim6.sys x64" is a technical hurdle typically accompanied by Error Code 27300. This error occurs when the Kaspersky installer fails to integrate the klim6.sys driver, which acts as an NDIS (Network Driver Interface Specification) filter responsible for intercepting and analyzing network traffic. Because this driver operates at a deep system level, its failure often stems from underlying conflicts with the operating system or other software. Primary Causes of the Error
The failure to install this specific driver is rarely a random event; it is usually triggered by specific system conditions:
Software Conflicts: The most frequent cause is the presence of other security software or leftover remnants from a previous antivirus installation. Programs that use similar NDIS filters, such as VMware, Cisco AnyConnect, or WinPcap, can also block the driver from binding to the network adapter.
Outdated Operating System: If Windows is not fully updated, required system components or digital certificates may be missing, preventing the secure installation of new kernel-mode drivers.
System File Corruption: Damaged Windows system files, particularly those related to the driver catalog (such as the catroot2 folder), can prevent the OS from recognizing or verifying the new driver.
Filter Limit Exceeded: Windows has a built-in limit on the number of network filter drivers that can be active simultaneously. If this limit is reached by other software, the Kaspersky driver cannot be added. Effective Troubleshooting Strategies
To resolve this issue, you must systematically clear these bottlenecks:
Error 27300 when installing a Kaspersky application for home Document version: 1