If you previously had a different antivirus (like Norton, McAfee, or even an older version of Kaspersky), leftover registry keys or filter drivers can block the new klif.sys from attaching to the file system stack.
According to Kaspersky Support , this error is rarely caused by a bug in the software itself. Instead, it is usually a conflict with the Windows environment. Common causes include:
Windows cryptographic services or the driver catalog store ( catroot2 ) is corrupted. kaspersky error 27300 klif.sys-x64
Kaspersky requires the to be active to install its filter drivers. Press Win + R , type services.msc , and hit Enter. Find Base Filtering Engine .
The you are installing (e.g., Kaspersky Total Security, Kaspersky Internet Security, or the new Kaspersky Standard/Plus/Premium). If you previously had a different antivirus (like
If you had a installed right before this error appeared.
Before we dive into the error, it's essential to understand what KLIF.SYS-X64 is. KLIF.SYS, or Kaspersky Low-Level Intercept Filter, is a system driver used by Kaspersky antivirus to intercept and analyze system calls, helping to detect and prevent malicious activities. The "-X64" suffix indicates that this is a 64-bit version of the driver, designed for 64-bit Windows operating systems. Common causes include: Windows cryptographic services or the
In less common cases, other solutions can be effective:
Several underlying system conflicts can prevent the klif.sys_x64 driver from registering properly: