If all else fails, you might consider manually installing the driver:

Here is a step-by-step guide to clearing this error and getting your protection up and running. 1. Use the Kaspersky Removal Tool (kavremover)

The following steps are consolidated from official support resources:

To resolve the Error 27300, try the following steps:

If you have another firewall or a VPN (like NordVPN, AnyConnect, or OpenVPN) active, their drivers might be competing for "exclusive" access to the network stack.