Once complete, perform a full rather than a reboot. Turn the PC back on manually to clear the system cache. 2. Modify the Windows Registry Network Configuration
When you see an error message like "Error 27300. Error installing driver klim6.sys_x64," it means the installer has attempted and failed to properly place and register this filter driver into the Windows system core (the C:\Windows\System32\drivers folder). This failure isn't just a minor inconvenience; it prevents the core network protection features of Kaspersky from functioning correctly, often leading to an aborted installation. kaspersky error installing driver klim6sys x64 upd
Restart your computer normally and attempt the installation again. 2. Manually Delete the Driver File Once complete, perform a full rather than a reboot
and press Enter. This removes any stuck service definitions. Kaspersky Support Forum 3. Fix System Corruptions Modify the Windows Registry Network Configuration When you
When installing or upgrading Kaspersky security products—such as , or Kaspersky Endpoint Security —the process may suddenly abort with a rolling back action. The most common error text reads: "Application installation error Error 27300. Error installing driver klim6.sys_x64. Changes made in the operating system will be automatically rolled back."
involving the klim6.sys_x64 driver typically occurs during installation or updates when there are leftover driver fragments, conflicting network software, or corrupted system certificates. Kaspersky Support Forum Quick Fixes & Preparations Verify Requirements
Ensure no other antivirus remnants (e.g., McAfee or Sophos) are present; use their specific removal tools if necessary.