Home » Tech Tips » Rebuilding the Boot Configuration Data (BCD) is a crucial step in troubleshooting the EFI Microsoft Boot BCD error. This process involves recreating the BCD from scratch to resolve any issues with its configuration. To rebuild the BCD Rebuilding the Boot Configuration Data (BCD) is a crucial step in troubleshooting the EFI Microsoft Boot BCD error. This process involves recreating the BCD from scratch to resolve any issues with its configuration. To rebuild the BCD July 19, 2024 by John Elmore follow these steps: