Run the tool, select the product you were trying to install, and click .
Type the following commands one by one, hitting Enter after each:
The file is Kaspersky 's proprietary Anti-Virus NDIS Filter driver, which manages network interception, firewall configurations, and web traffic filtering. When Windows marks this driver installation as "exclusive" or blocked, it means a conflict in the Network Operating System layer or a corrupted cryptographic repository is stopping the driver registration. Root Causes of Error 27300 error 27300 error installing driver klim6sysx64 exclusive
Type in your Windows search bar, right-click it, and Run as Administrator .
Standard Windows uninstallation routines frequently leave driver keys in the registry. A deep purge is required to clear these out. Run the tool, select the product you were
Virtualization software and enterprise VPNs heavily hook into NDIS layers.
Another antivirus or firewall might be mistakenly blocking the Kaspersky driver, treating it as a threat. Root Causes of Error 27300 Type in your
: 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
: Traces of older Kaspersky builds or previous security tools (like Sophos, McAfee, or Norton) block the path.
Elias froze. The error code 27300 in the proprietary manual meant "Exclusive Hardware Lock." The driver couldn't install because the hardware itself was refusing to accept the software handshake.
If a previous version of the driver is locked, you can force its deletion via the command line. Command Prompt as an Administrator. Run the command: sc delete klim6