Go to the menu at the top and select Show hidden devices . Expand Non-Plug and Play Drivers (or Network Adapters ). Look for klim6 or Kaspersky Anti-Virus NDIS Filter .
: Temporarily disable any antivirus software that could potentially interfere with the installation process. Some security software might mistakenly flag the driver as malicious.
Select your specific software version from the drop-down menu (e.g., Kaspersky Endpoint Security, Kaspersky Standard).
Error 27300 is a critical installation failure that occurs when a security application fails to install the klim6.sys driver. This specific driver serves as a network filter (Kaspersky Anti-Virus Interceptor Mask), and its installation is often blocked by system integrity issues, leftover files from previous security software, or conflicts with other network-level drivers. Core Causes error 27300 error installing driver klim6sysx64 exclusive
This is the Kaspersky Lab Interceptor Mask driver. It functions as an NDIS (Network Device Interface Specification) filter driver. It intercepts all incoming and outgoing network traffic directly at the network adapter level to scan for malicious data packets, web threats, and network attacks.
Previous installations of Kaspersky, Sophos, McAfee, or Avast often leave behind ghost drivers that lock the system layer.
In some cases, manually installing the driver might resolve the issue: Go to the menu at the top and select Show hidden devices
He opened the command prompt, typing furiously to check running processes. tasklist | findstr "klim" Nothing.
This error is typically not a problem with the Kaspersky installer itself, but with your computer's environment. The main causes fall into a few key areas:
Surprisingly, some, particularly server-based, installations require a physical keyboard connection to pass driver verification checks. : Temporarily disable any antivirus software that could
, McAfee, or older Kaspersky versions) may leave "ghost" drivers or registry entries that block new driver installation NDIS Filter Limit
If the error persists, the physical driver file must be deleted manually. This requires booting into Safe Mode to bypass the "file in use" lock.
Corruption in the Windows "catroot2" folder, which stores driver signatures and certificates. Filter Limits:
Sometimes, simply restarting your computer and then attempting to install the driver again can resolve the issue.