: Leftover registry keys or system files from previous Kaspersky installations—or third-party antivirus software like McAfee—blocking the new driver's registration. Filter Driver Overload
Background services may lock driver installation.
C. Repair or reinstall Kaspersky (preferred sequence)
Users experiencing the Kaspersky Error 27300: KLIF.SYS-X64 may encounter the following symptoms: kaspersky error 27300 klif.sys-x64
To resolve Error 27300, follow these solutions in order from simplest to most advanced: 1. Use the Kaspersky Removal Tool (kavremover)
No. The product is non-functional without klif.sys . It is mandatory for real-time protection.
The "27300" is a generic code that points to a failure during driver installation. However, the error message often includes a second, more specific code that helps pinpoint the exact issue. For the driver klif.sys_x64 , you might encounter messages with additional codes like 2147023836 , 2147023828 , 2147024894 , 2147023170 , 2147024864 , 2147024865 , or 2147024809 . : Leftover registry keys or system files from
Below is a comprehensive guide to understanding and fixing this specific issue.
If you previously had other antivirus software, their own filter drivers remain active and conflict with klif.sys . Use the tool from Microsoft Sysinternals.
Upon reboot, press or F7 on your keyboard to select Disable driver signature enforcement . It is mandatory for real-time protection
Fixing Kaspersky Error 27300 (klif.sys-x64) During Installation
Windows requires all kernel-mode drivers to be digitally signed. Sometimes, a Windows update or security policy blocks the klif.sys driver during installation. Disabling this enforcement temporarily can bypass the block.
Windows requires all drivers to be digitally signed. Sometimes, the signature verification fails, leading to this error.
If you have tried these steps and the issue persists, please contact Kaspersky support directly for personalized assistance.