Symptom 1: “ Disk Boot Failure” error screen on startupĮvery time a computer is turned on, as part of the boot process the BIOS tries to find a bootable drive to continue the loading process by starting its first sector. The error messages, alerts, warnings, and symptoms below are tied to this error. The following information on this error has been compiled by NeoSmart Technologies, based on the information gathered and reported by our global network of engineers, developers, and technicians or partner organizations. 3.2 Fix #2: Remove newly installed hardware, check data cables and jumpers.