Windows 10/8/7上大多数无法启动情况的根源是由配置错误甚至损坏的启动配置数据^{(Boot Configuration Data)}文件（也称为BCD ）引起的。BCD包含有关如何启动Windows 操作系统^{(Windows operating system)}的启动配置参数。

在早期版本的Windows中，它存储在Boot.ini 文件^{(Boot.ini file)}中。在基于EFI的操作系统上，您将在EFI固件引导管理器中找到该条目，该管理器位于\EFI\Microsoft\Boot\Bootmgfw.efi。

微软^(Microsoft)从Boot.ini升级到BCD的主要原因之一是为了改进工作并引入新功能，如启动修复工具^{(Startup Repair Tool)}、多用户安装^{(Multi-User Install)}快捷方式等。

大多数系统^(System) 管理员使用名为^{(Administrators)}BCDEdit.exe的命令行实用程序，它可以帮助用户修改、创建、编辑引导配置数据^{(Boot Configuration Data)}中的删除条目。我们可以使用BCDEdit.exe执行的一些操作是：

• 向现有 BCD 添加条目
• 从 BCD 中删除条目
• 显示所有活动设置
• 更改默认超时值

您可以使用BCDEdit.exe做更多事情。但是这个命令的问题在于它对于试图修复某些东西的普通用户来说不是很友好。一个小错误可能会使您的操作系统无法启动。因此，如果您想修复您的BCD，有很多应用程序可以帮助您简化此过程。例如，大多数磁盘管理^{(Disk Management)}软件都会内置一些命令——如MBR修复等。

修复引导配置数据^{(Repair Boot Configuration Data)}或BCD

今天，我将讨论一个名为Dual Boot Repair Tool 的便携式实用程序。^{(Dual Boot Repair Tool.)}此工具中有一些非常有用的命令可以帮助您修复和修复MBR、PBR、BCD和磁盘结构。我将通过选项来解释它的作用。

修复 BCD^{(Repair BCD)(Repair BCD)}：顾名思义。该实用程序将检查BCD是否存在不正确的参数或任何类型的错误，并将纠正它。在继续之前，您需要选择具有BCD的驱动器、 ^(BCD)Windows文件夹的路径、语言和固件（ BIOS-MBR或EFI固件）。请记住^(Remember)，始终选择已更新的已安装操作系统。例如，如果您有Windows 7 和Windows 10，则需要选择Windows 10。

Backup / Export BCD：此选项将帮助您备份BCD，最好在进行任何细微更改之前备份BCD

Restore / Import BCD：如果出现问题，如果您之前进行过备份，则可以使用此选项恢复BCD

修复 MBR 和引导记录^{(Repair MBR & Boot Records)}：顾名思义，它可以修复您的主引导记录^{(Master Boot Record)}。当您需要解决MBR损坏问题或必须从^(MBR)MBR中删除非标准代码时，请使用此选项。另外，我相信，如果引导扇区被非标准引导扇区替换或者它被损坏了一段时间，它主要将一个新的引导扇区写入系统分区。它还修复了那些旧的NDLTR缺失问题。

其余的选项几乎是不言自明的。请记住^(Remember)，如果您不确定这些选项中的任何一个，请使用自动修复^{(Automatic Repair)}选项，与其他命令相比，它更安全。

双启动修复工具下载

双启动修复工具^{(Boot Repair Tool)}是一个漂亮的小工具，它将成为您USB收藏的一个很好的补充。您可以从www.boyans.net 下载该工具。^{( www.boyans.net.)}

另请阅读：^{(Also read:)}

1. 修复 Windows 10 中的主引导记录^{(Repair Master Boot Record in Windows 10)}
2. 适用于 Windows 的高级 Visual BCD 编辑器^{(Advanced Visual BCD Editor for Windows)}
3. 无法打开引导配置数据存储^{(The boot configuration data store could not be opened)}
4. EasyBCD：编辑 Windows 引导设置并配置引导加载程序^{(EasyBCD: Edit Windows boot settings and configure the bootloader)}。

Dual Boot Repair Tool: Repair BCD Boot Configuration Data

The ѕource of most of the unbootable situations on Windows 10/8/7 is caused by a misconfiguration or еνen corruptеd Boot Configuration Data files, otherwise known as BCD. BCD contains boot configuration parameters on how to start your Windows operating system.

In earlier versions of Windows, it was stored in the Boot.ini file. On EFI-based operating system, you’ll find the entry in the EFI firmware boot manager, which is located at \EFI\Microsoft\Boot\Bootmgfw.efi.

One of the main reasons Microsoft upgraded from Boot.ini to BCD was to improve the working and introduce new features like Startup Repair Tool, Multi-User Install shortcuts, etc.

Most of the System Administrators use the command line utility called BCDEdit.exe, which helps the user to modify, create, edit delete entries from Boot Configuration Data. Some of the operations we can perform using BCDEdit.exe are:

• Add entries to an existing BCD
• Delete entries from a BCD
• Display all the active settings
• Change the default time-out value

There are a lot more you can do with BCDEdit.exe. But the problem with this command is that it’s not very user-friendly for an average user who is trying to fix something. A small mistake can make your operational system un-bootable. So if you want to repair your BCD, there are a lot of applications that help you make this process easier. For example, most of the Disk Management software will have some command build into it – like MBR repair, etc.

Repair Boot Configuration Data or BCD

Today, I’ll discuss a portable utility called Dual Boot Repair Tool. There are some really useful commands in this tool that will help you fix and repair MBR, PBR, BCD, and the disk structure. I’ll go over the options to explain what it does.

Repair BCD: It does exactly as the name suggests. The utility will check the BCD for incorrect parameters or any sort of error, and it will correct it. Before you proceed, you need to select the drive you have the BCD, the path of your Windows folder, language, and firmware (BIOS-MBR or EFI firmware). Remember, always select the installed OS that is updated. For example, if you have Windows 7 and Windows 10, you need to choose Windows 10.

Backup / Export BCD : This option will help you back up your BCD, it’s best that you back up your BCD before making any minor changes

Restore / Import BCD : If something goes wrong you can use this option to restore your BCD if you have done a backup before

Repair MBR & Boot Records: Just like the name suggests, it can repair your Master Boot Record. Use this option, when you need to resolve MBR corruption issues, or when you have to remove non-standard code from the MBR. Also, I believe, it writes a new boot sector to the system partition mostly, if the boot sector was replaced with a non-standard boot sector or if it was damaged some time. It also fixed those old NDLTR missing issues, as well.

The rest of the options are pretty much self-explanatory. Remember, if you are unsure about any of these options, please use the Automatic Repair option, which is much safer compared to the other commands.

Dual Boot Repair Tool download

Dual Boot Repair Tool is a nifty little tool that will be a good addition to your USB collection. You can download the tool from www.boyans.net.

Also read:

1. Repair Master Boot Record in Windows 10
2. Advanced Visual BCD Editor for Windows
3. The boot configuration data store could not be opened
4. EasyBCD: Edit Windows boot settings and configure the bootloader.

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