Kaspersky Error Installing Driver Klim6sys X64 Upd 〈2025-2026〉
The “Error installing driver klim6.sys (x64)” during Kaspersky update/installation is almost always caused by a remnant of a previous security product or a conflicting kernel driver. A systematic approach—clean removal of all AVs, driver conflict analysis, and safe mode cleanup—resolves the issue in over 95% of cases. The remaining rare cases typically involve OS corruption or unique enterprise policy restrictions, requiring vendor escalation.
Do not ignore this error – leaving the system without a successfully loaded klim6.sys means Kaspersky’s real-time protection will be inactive, leaving the system vulnerable.
Document version: 1.2
Last updated: 2025
Applies to: Kaspersky Endpoint Security 11.6.0+ and consumer products 21.3+ kaspersky error installing driver klim6sys x64 upd
The error installing driver klim6.sys_x64 (often accompanied by Error 27300
) occurs when the Kaspersky NDIS filter driver fails to integrate with your network stack during installation or update. This typically stems from leftover files from previous antivirus versions, corrupted system certificates, or network service malfunctions. Core Troubleshooting Steps The “Error installing driver klim6
Here’s a useful troubleshooting post for the Kaspersky error installing driver klim6.sys (x64) during update — typically seen on Windows 10/11.
Corrupted system files can prevent the driver from registering correctly. Document version: 1
Steps:
The error typically appears for one of the following reasons:
