Short description of Nucleus Kernel BKF Repair Software 8.05.01: Nucleus Kernel BKF is a advance easy and user friendly backup repair software for corrupt (.bkf) files. Software uses QFSCI technology to repair corrupt or damaged BKF files. It is one of the most widely used backup repair software by Home Users, Computer Technicians, System Administrators, R and D Institutes, Academic Institutes, Defense Establishments etc.