: Corruption in the Windows Catroot2 folder or issues with digital signature validation (Error 0x8000ffff).
Other antivirus software is attempting to use similar network filter drivers.
fails, use an elevated Command Prompt to manually remove the service entry: sc delete klif sc delete klim6 if a network driver is also failing). Kaspersky Support Forum 3. Resolve Third-Party Filter Conflicts kaspersky error 27300 klif.sys-x64
Previous security software or virtual network drivers (VMware, Cisco AnyConnect) conflict with the new driver installation.
This error typically appears during installation when Kaspersky tries to install its core network filter driver (klif.sys or sometimes klim6.sys). The klif.sys component is crucial for system monitoring, ensuring network traffic safety, and protecting kernel-level operations. When this driver fails to register, the installation halts. : Corruption in the Windows Catroot2 folder or
The Base Filtering Engine is a Windows service that manages firewall and security policies. If BFE is stopped or damaged, Kaspersky cannot install its network-level drivers. Press Windows Key + R , type services.msc , and press . Scroll down and locate Base Filtering Engine . Check its status: If it is Stopped , right-click it and select Start . If it is already running, right-click and select Restart .
I've conducted a thorough search and found a few resources that might help you understand and resolve the Kaspersky error 27300 related to klif.sys-x64. Here's a compiled paper: Kaspersky Support Forum 3
Conflicting applications can "lock" the filter driver slots required by Check for Incompatible Apps