How To Back Up And Restore The Bcd File In Windows 10
The UEFI firmware can boot from drives of 2.2 TB or larger—in fact, the theoretical limit is 9.4 zettabytes. That’s roughly three times the estimated size of all the data on the Internet. That’s because UEFI uses the GPT partitioning scheme instead of MBR. It also boots in a more standardized way, launching EFI executables rather than running code from a drive’s master boot record. In 2007, Intel, AMD, Microsoft, and PC manufacturers agreed on a new Unified Extensible Firmware Interface (UEFI) specification.
The Boot Configuration Data file doesn’t contain valid information for an operating system. Before you start using the bootrec or the diskpart command to fix the bootloader of your Windows 7 system, first you must determine that UEFI/EFI loads with the Legacy mode active. PCs with Windows 8 and Windows 8.1 usually have UEFI/EFI installed and not BIOS, but PCs with Windows 7 will use the UEFI/EFI set with Legacy mode active. Use of boot configuration data, or BCD, and the Windows bootloader was introduced with Windows Vista. This new standard avoids the limitations of the BIOS.
This is an industry-wide standard managed by the Unified Extended Firmware Interface Forum, and isn’t solely driven by Intel. UEFI support was introduced to Windows with Windows Vista Service Pack 1 and Windows 7.
- Create a Windows 10 installation media DVD/CD disc by using Microsoft’s Media Creation tool.
- Hello Paul, nice to hear you, we couldn’t take precautions in such cases like Blue screen, BCD, errors to prevent them from occurring.
- However, d3d8.dll the USB 3.0 interface cannot be detected by Windows Repair Environment.
- For example, some users boot with the advanced USB 3.0 interface.
To Rebuild Mbr
The chkdsk tool works pretty much the same in all versions of Windows. We’ll also talk about running it from the Command Prompt, in cases where you can’t even boot into Windows. If you do have Windows installation media, you can use it to boot from and access the recovery options.
The vast majority of computers you can buy today now use UEFI rather than a traditional BIOS. BCD or otherwise known as Boot Configuration Data contains boot configuration parameters on how to start your Windows. If the configuration file gets corrupted, you will have to rebuild BCD or Boot Configuration Data file. Usually, when BCD gets corrupted, it results in unbootable situations on Windows 10/8/7.