the latest version of your Kaspersky product and attempt the installation again. 2. Uninstall Incompatible Software
The klif.sys driver must be loaded at boot time or during installation. If Windows blocks, rejects, or fails to start it, Error 27300 appears. Common causes include:
Corrupted Windows system files or damaged cryptographic services can prevent drivers from being signed or registered.
If none of the above works, gather the following and open a ticket with : kaspersky error 27300 klif.sys-x64
Follow these steps in order to resolve the installation failure.
If any value exists referencing klif.sys , delete the entire entry. , only the values.
Error 27300. Unable to install driver klif.sys-x64. The system cannot find the file specified. the latest version of your Kaspersky product and
msiexec /unregister msiexec /regserver net stop msiserver net start msiserver
Troubleshooting Guide: Decoding Kaspersky Error 27300 (klif.sys-x64)
If your system logs show "Catastrophic failure" (Error 0x8000ffff), the OS cannot verify the driver's catalog file. Command Prompt as Administrator. Stop the service: net stop cryptsvc Navigate to the directory: cd %systemroot%\system32 Rename the corrupted folder: ren catroot2 catroot2_old If Windows blocks, rejects, or fails to start
Windows requires all kernel-mode drivers to be digitally signed. Sometimes, a Windows update or security policy blocks the klif.sys driver during installation. Disabling this enforcement temporarily can bypass the block.
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.