If you are receiving this error while trying to install or update Kaspersky, it is highly likely that a previous version was not uninstalled correctly. Download the official Kaspersky Lab tool (kavremover) [2]. Boot your computer into .
If you encounter this error, follow this checklist in order.
The required background service is either stopped or corrupted. Step-by-Step Solutions to Resolve Error 27300 error 27300 error installing driver klim6sysx64 exclusive
Last updated: 2025. This guide applies to Windows 10, Windows 11, and Windows Server 2016/2019/2022.
If you have other security software installed, it might conflict with Kaspersky. Temporarily disable or uninstall other security software and then try to install Kaspersky. If you are receiving this error while trying
If the error persists after executing these steps, your system might have an irreversible NDIS stack breakdown. In this specific scenario, executing a or installing a freshly updated version of the installer package directly from the developer is recommended.
Standard Windows uninstallation often leaves old filter drivers bound to your network adapters. If you encounter this error, follow this checklist in order
The klim6sysx64.sys file in the Windows System32 directory is corrupted or locked.
Reboot your computer normally and attempt the installation again. Step 2: Increase the Network Filter Limit in Windows
If none of the above steps resolve the issue, it might be specific to your system configuration or a bug in the software. Consider reaching out to Kaspersky's customer support for more personalized assistance.
: Damage within the Windows Cryptographic Services prevents the installation of third-party kernel-level drivers. How to Fix Error 27300 ( klim6.sys_x64 )