If you are a Kaspersky user—whether running Kaspersky Internet Security, Kaspersky Total Security, Kaspersky Endpoint Security, or Kaspersky Free Antivirus—you might have encountered a frustrating roadblock during installation, update, or uninstallation: Kaspersky error 27300. This error is almost always accompanied by the specific driver reference klif.sys-x64.
This error can prevent you from installing, removing, or properly running Kaspersky products. It can also trigger system instability, blue screens, or failure of real-time protection. The good news is that this error is well-documented, and solutions exist—from simple driver fixes to advanced system modifications.
In this long-form guide, we will explore what error 27300 means, why the klif.sys-x64 driver is critical, what causes the problem, and how to fix it step-by-step on Windows 10 and Windows 11 (64-bit systems). kaspersky error 27300 klif.sys-x64
Corrupted Windows system files or a corrupted Windows Registry can prevent new service keys from being written to HKLM\SYSTEM\CurrentControlSet\Services.
Error 27300 is often an MSI error. Repair the installer service. How to Fix Kaspersky Error 27300 (klif
Steps (as Administrator in Command Prompt):
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$
Even if you uninstalled McAfee, Norton, or AVG years ago, Windows often retains boot-time drivers. These ghosts interfere with Kaspersky’s attempt to install klif.sys. Step 5: Re-installation
The Fix:
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.