Download the official utility from the Kaspersky support website.
This error class (27300) is often misdiagnosed as a generic MSI failure. The keyword exclusive is 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.
The file klim6.sys is the . This driver operates at the Network Driver Interface Specification (NDIS) layer, allowing the security software to intercept, scan, and filter network traffic for malicious activity before it reaches the operating system.
The regarding klim6sysx64 is a classic case of "driver lock." The security software is doing its job too well—even after you try to uninstall it, the driver stays active to protect the system. error 27300 error installing driver klim6sysx64 exclusive
If the removal tool fails, a "ghost" (hidden) network adapter might be locking the driver.
This error typically occurs because of corrupt legacy driver files, conflicts with existing network drivers, or strict digital signature enforcement in Windows 10 or 11.
: Ensure the Network Setup Service is present and set to Manual startup. If this service is damaged, it can block the installation of NDIS filter drivers. Common Conflicts to Check Download the official utility from the Kaspersky support
When an MSI-based installer reaches the stage, it attempts to:
is a textbook case of Windows security and driver conflict mechanisms working as designed, but inconveniently for the user. The error is not a hardware failure nor a fatal OS corruption. It is simply Windows telling you: "Another process has a private (exclusive) hold on this driver file or its registry entries."
Follow these troubleshooting steps in sequence to clear the conflicting infrastructure and successfully install your software. 1. Completely Purge Remnants with Kavremover The file klim6
Open the , type cmd , right-click Command Prompt , and select Run as Administrator .
Traces of previous installations from Sophos, McAfee, or older Kaspersky versions clinging to the network adapter.
Restart your computer once both processes complete successfully. Comparison of Critical Fix Components Action Level Tool/Target Core Benefit When to Use Kaspersky Kavremover Wipes orphaned kernel traces and registry blocks. Always attempt first. System Polish MaxFilters Registry Hack Increases the OS network driver binding cap from 8 to 14. If you use heavy VPNs or Virtual Machines. Conflict Clear VMware / Cisco Uninstall Frees up locked NDIS driver stack pathways. If Device Manager throws a "Code 56" error. OS Validation DISM & SFC Commands Repairs damaged driver signing catalogs. If installation rolls back at exactly 25%.
: Leftover driver fragments from a previous version or alternative security suites (like McAfee or Sophos).