Error 27300. Error Installing Driver Klif.sys-x64

Do not alter permissions on other system folders.

Run the System File Checker:

Sometimes a stalled registry entry prevents new drivers from registering correctly. Open the ( regedit ). error 27300. error installing driver klif.sys-x64

No. Without this driver, Kaspersky’s real-time protection, web antivirus, and firewall cannot function. The installer will always abort if klif.sys fails to install. Do not alter permissions on other system folders