If the Windows Catalog Database ( catroot2 ) is corrupted, the operating system will fail to verify the digital signature of klim6.sys , treating it as an unauthorized kernel-level modification. Step-by-Step Blueprint to Resolve Error 27300
Expand the section. If you see yellow warning triangles or virtual adapters showing Code 56 (Windows is configuring this class) , right-click and Uninstall device on those specific virtual adapters. 3. Enable the Network Setup Service
Error 27300 when installing a Kaspersky application for home error 27300 error installing driver klim6sysx64 exclusive
The most common cause is a corrupted "ghost" version of a previous Kaspersky product. Standard Windows uninstallation often leaves registry keys behind. Download the official utility from Kaspersky. Boot your computer into Safe Mode . Run kavremover.exe .
If you are encountering this error, follow these verified steps: Connect a Physical Keyboard If the Windows Catalog Database ( catroot2 )
On recent versions of Windows, a security feature called can, in rare cases, interfere with driver installation.
: Too many network filter drivers installed on the network adapter, exceeding system limits. Unsupported Hardware Download the official utility from Kaspersky
To resolve the Error 27300, follow these troubleshooting steps:
Repair & reinstall
This error usually triggers because the installer fails to replace or initialize the Kaspersky Anti-Virus NDIS Filter driver. According to Kaspersky Support
: Temporarily disable any antivirus software that could potentially interfere with the installation process. Some security software might mistakenly flag the driver as malicious.