Windows User Account Control (UAC) sometimes restricts driver registration even on admin accounts. Right-click the Kaspersky installer .exe file. Select . Go to the Compatibility tab. Check the box for Run this program as an administrator . Click Apply , then OK , and launch the installer. 3. Repair Damaged Windows System Files
: Missing or corrupted core Windows components prevent standard driver registration routines. Step-by-Step Solutions to Fix Error 27300
This error indicates that the installer cannot register the Kaspersky Linear Filtering Engine ( klif.sys ) driver with the Windows operating system. It usually happens due to leftover files from previous security software, corrupted network stacks, or strict Windows permissions.
Fixing Kaspersky Error 27300 (klif.sys-x64) During Installation kaspersky error 27300 klif.sys-x64
A clean boot starts Windows with a minimal set of drivers and startup programs. It helps in identifying if any software is causing the conflict.
The klif.sys file stands for . It is a 64-bit kernel-mode device driver responsible for low-level system monitoring. It intercepts system calls, tracks file modifications, and blocks malicious behavior before it reaches the operating system. Because it operates at the core kernel layer (Level 0), Windows enforces strict integrity and digital signature checks when loading it. Why Does the Installation Fail?
Here is the order of operations to resolve this. Start with #1 and move down. Go to the Compatibility tab
The klif.sys file is a core kernel-level driver that Kaspersky uses to monitor system activity and intercept threats. The installation fails when Windows blocks this driver from registering. Common causes include:
Check for "packet sniffing" software, which often interferes with the filter driver. Summary Checklist Kaspersky Support Run kavremover : Tool link Command Prompt ( cmd ): sc delete klim6 Reboot: Always reboot after these operations.
The most common cause is "residue" from a past antivirus version. Download the official kavremover tool Kaspersky Support Run the tool as an Administrator In the context of klif.sys-x64
Stalled pending operations can block driver writes.
Running multiple antivirus engines or legacy firewall drivers will block klif.sys .
Error 27300 is a generic Windows Installer error returned when a custom action attempts to register a service or driver and fails. In the context of klif.sys-x64 , the installation package failed to register the driver with the Windows Service Control Manager (SCM).
Ensure your Kaspersky software is up to date. Open Kaspersky, go to the "Update" section, and perform a manual update.
: Ensure you have enough free space and that your computer meets all hardware requirements .