When you see , the system is stopping the installation due to conflicts at the OS kernel level. The driver klif.sys (Kaspersky Lab Interceptor Filter) is responsible for monitoring file system activities and detecting malware in real-time.
Issues with the Base Filtering Engine (BFE) or Network Security Services in Windows.
The klif.sys file is a kernel-level driver. Windows strictly protects kernel-level modifications, meaning even slight system anomalies can block the installation. The most common causes include: kaspersky error 27300 klif.sys-x64
This error indicates that the installer cannot register the Kaspersky Linear Filtering Engine ( klif.sys ) driver with the Windows operating system. It usually happens due to leftover files from previous security software, corrupted network stacks, or strict Windows permissions.
If Windows believes the klif.sys-x64 driver is improperly signed, you can bypass this, install, and then re-enable it. Go to . Under Advanced startup , click Restart now . When you see , the system is stopping
Here is a comprehensive guide to troubleshooting and resolving this error. Why Error 27300 Occurs
When the installer attempts to register this driver, it passes specific error flags to the Windows Installer (MSI) engine. Common underlying causes include: The klif
Fixing Kaspersky Error 27300 (klif.sys_x64): A Complete Guide
Corrupted Windows system files or damaged cryptographic services can prevent drivers from being signed or registered.
In 2026, as Kaspersky updates its products for advanced Windows 11 environments, this error still appears, usually due to driver conflicts, corrupted previous installations, or strict Windows signature enforcement.
Cached installation files from failed setup attempts can cause conflicts during a reinstall. Press the to open the Run dialog box. Type %temp% and press Enter.