Error 27300 Error Installing Driver Klim6sysx64 Exclusive

The error usually means:

: Traces of previous Kaspersky installations or other antivirus software (e.g., McAfee) can block the new driver from installing.

User-facing output & rollback

Error 27300 during the installation of the Klim6sysx64 exclusive driver can stem from various issues, including corrupted files, outdated systems, or driver conflicts. By systematically addressing these potential causes and following the solutions provided, you should be able to resolve the error and successfully install the Klim6sysx64 driver. If issues persist, consider reaching out to Kaspersky's support team or a professional technician for personalized assistance. Ensuring your system drivers are up-to-date and compatible is crucial for optimal performance and security.

If the previous steps don't resolve the issue, try these targeted methods: error 27300 error installing driver klim6sysx64 exclusive

A standard Windows Control Panel uninstallation often leaves stubborn registry hooks and kernel drivers behind.

Press Win + X and select or Terminal (Admin) .

Run the following commands one by one, pressing Enter after each: net stop cryptsvc

Given that the klim6.sys_x64 driver is an NDIS filter driver, its most common "exclusive" conflict is with other network drivers. The error usually means: : Traces of previous

Use Sysinternals or Process Explorer :

Before diving into complex solutions, ensure the basics are covered:

If the conflict is with remnants of a previous Kaspersky installation, the best solution is to use Kaspersky's official tool, kavremover . Third-party uninstallers often leave behind klim6.sys fragments.

Open the and navigate to Programs and Features . If issues persist, consider reaching out to Kaspersky's

Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network Look for a value named MaxNumFilters .

This is a highly specific but documented cause for the error when klkbdflt2.sys is the driver listed. The Kaspersky installation process on server operating systems may fail if a physical keyboard is not detected. While this solution is not directly tied to klim6.sys_x64 , it highlights that a seemingly unrelated hardware check can cause a generic 27300 error.

When the setupapi.dev.log indicates a 0x8000ffff Catastrophic Failure, your OS is rejecting the driver's signature.

Download the latest version of the Kaspersky Kavremover tool .