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When a computer is turned on, the BIOS picks an eligible, bootable hard drive and then calls code stored in the MBR at the start of that hard drive. That MBR code in turn loads the bootsector from the active partition. Symptom 1: “0x0000007b” error screen on startup 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. 3.10 Fix #10: Repair the EFI bootloader.3.6 Fix #6: Replace NTLDR and NTDETECT.COM files.3.5 Fix #5: Check your disk with CHKDSK utility.3.4 Fix #4: Repair corrupted system files with the SFC command.3.3 Fix #3: Boot into Last Known Good Configuration.3.2 Fix #2: Check drive for viruses with Easy Recovery Essentials.3.1 Fix #1: Rebuild boot files with Easy Recovery Essentials.2.2 Cause 2: Incorrect BIOS configuration.2.1 Cause 1: Bootloader files are missing or corrupt.1.2 Symptom 1: “0x0000007b” error screen on startup.
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