Error 27300 Klif.sys-x64 - Kaspersky

If none of the above solutions work, it's best to contact Kaspersky support for further assistance. They can provide personalized help and guidance to resolve the issue.

Conclusion

The Kaspersky Error 27300: KLIF.SYS-X64 issue can be frustrating, but it's usually resolvable with some troubleshooting steps. By following the solutions outlined in this article, you should be able to resolve the error and get your Kaspersky antivirus software up and running smoothly. If you're still experiencing issues, don't hesitate to reach out to Kaspersky support for further assistance.

Kaspersky Error 27300 related to klif.sys usually happens when the installer fails to load or update the "Kaspersky Log-In Filter" driver. This often occurs because of leftovers from a previous installation or a conflict with existing hardware drivers. Quick Fixes

Remove Old Remnants: Use the Kavremover tool from Kaspersky Support to completely wipe previous installation files that might be blocking the new driver.

Connect a Keyboard: Surprisingly, this error can trigger on servers if a physical or virtual keyboard is not detected during the installation process. kaspersky error 27300 klif.sys-x64

Update Your Version: Ensure you are downloading the most recent installer from the official Kaspersky website, as this specific bug has been addressed in newer builds. Advanced Steps

Check for Driver Conflicts: Ensure no other antivirus software is active.

Run as Administrator: Right-click the installer and select Run as Administrator to ensure it has the permissions needed to write to system folders like C:\Windows\System32\drivers.

Verify Disk Space: Ensure you have enough free space and that your computer meets all hardware requirements.

Error 27300 when installing a Kaspersky application for home If none of the above solutions work, it's

klif.sys is a critical kernel-mode driver used by all modern Kaspersky products. The -x64 suffix indicates it is the 64-bit version designed for Windows 64-bit operating systems.

Functions of klif.sys include:

Because this driver runs at the deepest level of Windows (Ring 0), Windows protects it rigorously. Any conflict with other security software, corrupted driver registries, or insufficient permissions can trigger error 27300.

Error 27300 is often an MSI error. Repair the installer service.

Steps (as Administrator in Command Prompt): Because this driver runs at the deepest level

msiexec /unregister
msiexec /regserver
net stop msiserver
net start msiserver

Then run the Kaspersky installer again.

Additionally, clear the MSI cache:

del /f /s /q %windir%\Installer\$PatchCache$

Conflicting drivers are a prime suspect. Use the uninstaller of any other security product, then run its vendor’s removal tool (e.g., McAfee Consumer Product Removal tool, Norton Removal Tool). Reboot afterward.

Background services may lock driver installation.

Steps:

No. The product is non-functional without klif.sys. It is mandatory for real-time protection.