Once the computer restarts again, press or F7 to select "Disable driver signature enforcement." Install Kaspersky.
The error typically stems from one of three primary system-level conflicts: Operating System Integrity Issues : Corruption in Windows Cryptographic Services Catalog Database kaspersky error 27300 klif.sys-x64
An uncompleted upgrade or an improper uninstall leaves active registry entries that conflict with fresh driver deployments. A normal Control Panel uninstallation is rarely sufficient to clear kernel driver locks. Once the computer restarts again, press or F7
Windows may block klif.sys if signature verification fails. Disabling it allows the driver to load. Once the computer restarts again
Remove the driver by typing: pnputil -d oemXX.inf (Replace XX with the number you found in the previous step). Step 3: Refresh the Network Stack