Kaspersky Error 27300 Klif.sys-x64 ^hot^ » | CONFIRMED |

Additionally, clear the MSI cache:

The full error message often reads: Error 27300. Unable to load driver klif.sys-x64. Access is denied. Or: Error 27300. Unable to install driver klif.sys-x64. The system cannot find the file specified. In some cases, the error appears during uninstallation, reading something like: Error 27300. Unable to remove driver klif.sys-x64. The device is not ready. 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. kaspersky error 27300 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. Additionally, clear the MSI cache: The full error

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 . Or: Error 27300

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\PendingFileRenameOperations

If you have tried all nine methods and still face the issue, contact Kaspersky Technical Support and provide the log files located at %temp%\kis_install.log or %programdata%\Kaspersky Lab\*.log . They can supply specialized .reg fix scripts or debug builds of the driver. Modifying system drivers and registry entries carries risk. Always back up important data before proceeding. This guide is for informational purposes only. Follow steps at your own risk.