Windows 11 and recent Windows 10 builds include or "Memory Integrity." This feature blocks third-party drivers that are not fully compatible with virtualization-based security.
If no other method works, the Windows Driver Store is corrupted. Instead of reinstalling Windows from scratch, perform an .
Windows preventing the installer from writing to the C:\Windows\System32\drivers directory.
If klif.sys is listed, reboot twice.
the computer completely after removal, then power it back on manually rather than just restarting. Kaspersky Support Forum 2. Check for Incompatible Software
If you are seeing the message: you have landed in the right place.
After booting into Safe Mode, I ran sc delete mfehidk . The system returned "access denied" because the driver was still running. I then used the in Safe Mode. After a reboot, the klif.sys error vanished, and Kaspersky installed cleanly.
Drainage Stoke