Only proceed if you have confirmed the source is safe and the driver is required for some niche hardware:
But again – doing this for klim6sysx64 without knowing its origin is high‑risk.
Q: Is Error 27300 a virus?
A: No. It is a legitimate Windows installer error. However, some malware uses driver names similar to klim6 to hide. Always download Kaspersky from the official website.
Q: Can I ignore the error and use the PC without the driver?
A: No. The klim6 driver is core to Kaspersky’s protection. Without it, the antivirus will run in a degraded state (real-time protection will fail). You must fix the error.
Q: What if I don’t use Kaspersky but still see this error?
A: Some third-party driver updaters or system optimizers incorrectly try to install renamed copies of klim6. Run a full malware scan using Windows Defender Offline.
Q: Error 27300 appears with a different driver name (e.g., klif.sys).
A: The same solutions apply. Replace klim6 with the driver name shown in your error. For klif, klhk, or klflt, use Methods 3, 4, and 5.
Error 27300 + exclusive + klim6sysx64 is not a random corruption – it is a deterministic resource locking conflict caused by a residual Kaspersky kernel driver or another security product asserting exclusive access. The solution requires breaking the lock via Safe Mode or a vendor removal tool. Without addressing the exclusive lock, standard retries will continue to fail.
Final note for IT administrators: This error class (27300) is often misdiagnosed as a generic MSI failure. The keyword
exclusiveis the critical diagnostic clue – it points directly to a share violation at the file or service control manager level, not a missing dependency or corrupt MSI database.
Report generated for diagnostic reference. Use official vendor tools where available.
Error 27300 (specifically involving the driver klim6.sys_x64_70_exclusive
) is a known issue occurring during the installation or upgrade of
security products. It typically indicates a conflict with the network filter driver or missing hardware dependencies. Core Cause
This error usually triggers because the installer fails to replace or initialize the Kaspersky Anti-Virus NDIS Filter driver. According to Kaspersky Support
, a specific and surprising cause for this on some systems is the absence of a connected keyboard during the installation process. How to Fix It
If you are encountering this error, follow these verified steps: Connect a Physical Keyboard
: If you are installing this on a server or a "headless" machine via remote desktop, ensure a physical keyboard is plugged into the device. Use the Kavremover Tool
: Residual files from a previous installation often block the new driver. Download the official Kaspersky removal tool (kavremover) to completely wipe old traces before retrying the install. Download the Latest Version
: Kaspersky has released patches for this specific bug. Ensure you are using the most recent installer from the Kaspersky Download Center Check for Driver Conflicts
: In some cases, other VPNs or firewall software with their own NDIS filters (like OpenVPN or Cisco AnyConnect) can cause "exclusive" access errors. Try temporarily disabling or uninstalling these before the Kaspersky setup. Technical Summary Error Code (Kaspersky Lab Interceptor and Masker) Primary Target Windows 10 / Windows Server Resolved in latest builds (March 2025) Are you seeing this error on a personal PC remote server error 27300 error installing driver klim6sysx64 exclusive
Error 27300 when installing a Kaspersky application for home
Troubleshooting Error 27300: A Comprehensive Guide to Installing Klim6sysx64 Exclusive Driver
Are you encountering the frustrating Error 27300 while attempting to install the Klim6sysx64 exclusive driver? This error can be a significant roadblock, preventing you from completing the installation process and potentially leaving your system vulnerable to security threats or depriving you of essential functionality. In this article, we will delve into the causes of Error 27300, explore various troubleshooting methods, and provide a step-by-step guide to successfully install the Klim6sysx64 exclusive driver.
Understanding Error 27300
Error 27300 is a generic error message that appears during the installation of the Klim6sysx64 exclusive driver, often without providing detailed information about the cause. This lack of specificity can make troubleshooting more challenging. However, it is commonly associated with issues such as:
Preparation Steps Before Installation
Before proceeding with the installation of the Klim6sysx64 exclusive driver, ensure you have taken the following preparatory steps:
Troubleshooting Error 27300
If you encounter Error 27300 during the installation of the Klim6sysx64 exclusive driver, follow these troubleshooting steps:
Kaspersky Error 27300 occurs when the installer fails to load network filter drivers, usually triggered by leftover files from previous security programs, network driver conflicts, or system file corruption. Solutions include using the Kaspersky removal tool, deleting the "klim6" driver service via Command Prompt, removing conflicting third-party network software, and repairing system files. For more details, visit Kaspersky Support.
Error 27300 typically occurs during the installation of Kaspersky software when the system fails to install the klim6.sys driver, which acts as a packet network filter. This failure is often caused by leftover drivers from previous security software, corrupted system files, or conflicts with other network-filtering applications like VMware or Cisco AnyConnect. Common Causes
Residual Drivers: Files from previous installations of Kaspersky or other antivirus programs (e.g., McAfee, Sophos) remaining in system32.
Third-Party Conflicts: Applications that use NDIS filters, such as VMware Workstation, Cisco AnyConnect, or WinPcap, can interfere with the driver installation.
System Integrity Issues: Corruption in Windows Cryptographic Services or the catalog database (catroot2).
Unsupported Hardware: Attempting to install on devices with ARM processors (like Snapdragon), which are not supported by some Kaspersky versions. Recommended Solutions To resolve the error, try the following steps in order: Error 27300 when installing Kaspersky Small Office Security
Error 27300 typically occurs during the installation of Kaspersky software when the system fails to install the klim6.sys (Kaspersky Anti-Virus NDIS Filter) network driver. This is often due to existing driver conflicts, leftover files from previous installations, or an overloaded NDIS filter limit in Windows. Recommended Troubleshooting Steps
Perform a Clean Removal of Previous VersionsLeftover files from old Kaspersky installations frequently cause this conflict.
Download and run the official Kavremover tool to purge all traces of previous Kaspersky products. Restart your computer immediately after the tool finishes. Only proceed if you have confirmed the source
Manually Remove the Conflicting ServiceIf the driver is "stuck," you can manually delete the service via the Command Prompt: Open Command Prompt as an Administrator. Type sc delete klim6 and press Enter. Attempt to reinstall the software.
Check for Incompatible Network SoftwareThird-party applications that use NDIS filters can block new driver installations. Known culprits include: VMware (Workstation or Player) Cisco AnyConnect WinPcap or NPF Other Antivirus software (e.g., McAfee)
Solution: Temporarily uninstall these applications or update them to their latest versions to refresh their drivers before trying the Kaspersky installation again.
Verify Network Setup ServiceThe 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.
Address Registry Issues (Windows 7/8 Only)If you are on an older version of Windows, renaming a specific registry key can sometimes clear driver registration blocks:
Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network. Find the Config parameter and rename it to Config2. Restart and try the installation again. Common Error Variants
Error 0x8000ffff: Often linked to corrupt cryptographic services or catalog databases.
Error -2147024770: Usually indicates a general failure where the system cannot find or overwrite the specified driver file.
Error 27300 is a critical installation failure that occurs when a security application, typically from , cannot install the
NDIS filter driver. This error usually results in an automatic rollback of the installation process. Kaspersky Support Forum Common Causes
The error is often triggered by remnants of previous security software or conflicts within the Windows networking stack: Leftover Drivers : Uninstalled antivirus programs (like
, McAfee, or older Kaspersky versions) may leave "ghost" drivers or registry entries that block new driver installation NDIS Filter Limit
: Windows has a limit on the number of network filter drivers that can be active; exceeding this limit prevents from installing. Third-Party Conflicts
: Applications like VMware, Cisco AnyConnect, or WinPcap (NPF) use similar network filters and can interfere with the installation. OS Integrity Issues : Corruption in the Windows Cryptographic Services or the
folder can prevent the system from validating the driver's digital signature. Kaspersky Support Forum How to Fix Error 27300 1. Use Specialized Removal Tools
A standard uninstall often leaves traces behind. Use the official Kavremover tool to purge all remnants of previous installations Kaspersky Support Forum Run the tool in for maximum effectiveness. Reboot your PC immediately after the removal process. Kaspersky Support Forum 2. Manual Driver Cleanup
If the removal tool fails, you may need to manually delete the problematic service entry: Command Prompt as an Administrator. sc delete klim6
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 But again – doing this for klim6sysx64 without
: If you use VMware or Cisco AnyConnect, try reinstalling them. This can sometimes refresh the NDIS filter stack and allow the new driver to register. Check Services : Ensure the Network Setup Service is present and set to startup in Windows Services ( services.msc 4. System File Repair
Corrupted system files are a leading cause of driver installation failures. System File Checker sfc /scannow in an elevated Command Prompt.
If errors are found, follow the prompts to repair them before restarting the installer. 5. Disable Driver Signature Enforcement (Temporary)
In rare cases, the system may block the driver due to signature validation issues.
Error 27300 when installing a Kaspersky application for home
Error 27300: Troubleshooting Guide for Klim6sysx64 Exclusive Driver Installation
Are you encountering the frustrating "Error 27300" while trying to install the Klim6sysx64 exclusive driver? This error can be a major roadblock, preventing you from updating or installing the necessary drivers for your system. In this write-up, we'll guide you through the possible causes, solutions, and troubleshooting steps to resolve the issue.
What is the Klim6sysx64 exclusive driver?
The Klim6sysx64 exclusive driver is a software component developed by Kaspersky Lab, a well-known cybersecurity company. The driver is designed to interact with the Kaspersky antivirus software and provide enhanced system protection. The "exclusive" label suggests that this driver is specific to certain systems or configurations.
Causes of Error 27300
After researching and analyzing user reports, we've identified some potential causes of the Error 27300:
Troubleshooting Steps
To resolve the Error 27300, try the following steps:
Advanced Troubleshooting
If the above steps don't resolve the issue, you may want to try:
Conclusion
Error 27300
Context: Driver Installation Failure
Affected Driver: klim6sysx64.sys
Issue Type: Exclusive Access / Permissions Conflict