The most common cause is "residue" from a past antivirus version. Download the official kavremover tool Kaspersky Support Run the tool as an Administrator
The error 27300 typically occurs when there's an issue with the KLIF.SYS-X64 driver. Some common causes include: kaspersky error 27300 klif.sys-x64
Error 27300 is a critical installation error in Kaspersky products that The most common cause is "residue" from a
If system files are corrupted, the driver cannot load into the kernel. kaspersky error 27300 klif.sys-x64
If you previously had other antivirus software, their own filter drivers remain active and conflict with klif.sys . Use the tool from Microsoft Sysinternals.
Kaspersky Error 27300 typically occurs during the installation or upgrade of Kaspersky products when the system fails to install the driver (Kaspersky Log Inspection Filter)