如果您在 Windows 10 上遇到 No bootable device 错误，(No bootable device error on Windows 10)那么原因可能是您的硬盘驱动器的主分区可能由于配置错误而处于非活动状态。
启动计算机意味着启动计算机的操作系统。当计算机打开并且计算机通电时，系统执行启动过程，从而激活操作系统。操作系统是将硬件和软件绑定在一起的程序，即操作系统负责识别与系统相连的每一个硬件设备，也负责激活控制系统的软件和驱动程序。
当无法找到可以是任何形式的存储设备（如硬盘驱动器、USB闪存驱动器、DVD等）的引导设备或该设备中的文件已损坏时，Windows 中不会出现可引导设备错误。要解决此问题，以下方法可能会有所帮助。
修复(Fix No Bootable Device Error)Windows 10上的无可启动设备错误
方法 1：通过将引导模式设置为 UEFI 来修复(Method 1: Fix by Setting Boot Mode to UEFI)
通过将启动模式更改为UEFI（统一可扩展固件接口(Extensible Firmware Interface)），可以解决无法启动设备的问题。UEFI是一种与其他模式略有不同的引导模式。将启动菜单更改为UEFI不会损害您的计算机，因此您可以尝试一下。跟着这些步骤。
1. 打开电脑，按住F2键打开 BIOS。
2. 引导模式选项通常位于引导(Boot)选项卡下，您可以通过按箭头键访问该选项卡。您必须按箭头键的次数没有固定值。这取决于BIOS固件制造商。
3.找到Boot模式，回车(Enter)，将模式改为UEFI。
4. 要退出并保存更改，请按F10，然后在保存更改的选项上按 Enter。
5. 之后，启动过程将自行启动。
另请阅读：如何检查您的 PC 是否使用 UEFI 或 Legacy BIOS(How to Check if your PC is using UEFI or Legacy BIOS)(Also Read: How to Check if your PC is using UEFI or Legacy BIOS)
这就是您可以将引导模式更改为UEFI的方法。设置UEFI启动模式并启动启动后，检查错误是否仍然出现。
方法二：修复启动信息(Method 2: Fix the boot information)
如果您尝试引导设备并且出现错误 no bootable device ，则可能是由于系统的引导信息（例如BCD（引导配置数据）(BCD (Boot Configuration Data))或MBR（主引导记录）(MBR (Master Boot Record))已损坏或被感染）所致。要尝试重建此信息，请按照下列步骤操作。
1.借助 Windows 安装介质从USB驱动器、DVD或 CD等可启动设备启动。
2. 选择语言和地区。
3.找到修复您的计算机(Repair your computer)的选项并选择它。
4. 对于Windows 10，选择疑难解答(Troubleshoot)。
5.高级(Advanced)选项将打开，然后单击命令提示符。(Command Prompt.)
6. 依次键入以下命令，并在每个命令后按键盘上的Enter 键。(Enter )
bootrec/fixmbr
bootrec/fixboot
bootrec/scanos
bootrec/rebuildbcd
7.如果要求将新安装添加到引导列表，请按Y，然后按Enter 。
8. 退出命令提示符。
9. 重新启动系统并检查错误。
您可能能够修复 Windows 10 上的 No Bootable Device 错误( fix No Bootable Device error on Windows 10)，如果不能，则继续下一个方法。
方法三：修复主分区(Method 3: Fix the primary partition)
主分区保存操作系统。有时，由于硬盘主分区出现问题，可能会出现无法启动设备的错误。由于(Due)某些问题，主分区可能已变为非活动状态，您需要再次将其设置为活动状态。为此，请按照以下步骤操作。
Also Read: 6 Ways to Access BIOS in Windows 10 (Dell/Asus/ HP)
1. 如上述方法所述，通过选择疑难解答从高级选项中打开(Troubleshoot)命令提示符(Command Prompt)。
2.输入diskpart然后按Enter。
3.输入list disk然后按Enter。
4. 选择安装操作系统的磁盘。
5. 键入select disk 0并按Enter。
6. 每个磁盘有几个分区，要查看它们，请键入list partition并按Enter。系统保留分区(System Reserved Partition)是引导加载程序所在的分区。分区 1 就是我们正在讨论的这个分区。系统保留分区通常是最小的。
7. 键入select partition 1并按Enter。
8. 激活主分区类型active然后按Enter。
9. 输入exit 并回车退出diskpart，然后关闭命令提示符。
10. 重新启动计算机。
您现在应该能够修复 Windows 10 上的无可启动设备错误(Fix No Bootable Device Error on Windows 10)，如果不能，则继续下一个方法。
方法四：重置系统(Method 4: Reset the System)
如果上述所有方法都无法解决问题，那么您的系统中可能有一些文件已损坏并导致问题。重置系统，看看这是否解决了问题。为此，您需要首先下载适用于特定 Windows 版本的Microsoft 媒体创建工具(Microsoft’s Media Creation Tool)。下载后按照以下步骤操作。
1. 打开媒体创建工具。
2. 接受许可并单击下一步。(Next.)
3. 单击 为另一台 PC 创建安装媒体(Create installation media for another PC)。
4. 选择语言、版本和架构(language, edition, and architecture)。
5. 选择要使用的媒体，DVD选择ISO 文件(ISO file)选项， USB 选择USB 闪存驱动器(USB flash drive)。
7. 您现在可以将此媒体插入系统并重新安装操作系统。( reinstall your operating system.)
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这些是在 Windows 10 上修复 No Bootable Device Error(Fix No Bootable Device Error on Windows 10)的几种方法。如果您有任何疑问或疑问，请随时在评论部分提出。
Fix No Bootable Device Error on Windows 10
If you’re facing No bootable device error on Windows 10 then the reason may be the primary partition of your hard drive might be inactive due to misconfiguration.
Booting up a computer means starting the operating system of the computer. When the computer is switched on and the power comes to the computer the system performs booting process which activates the operating system. The operating system is the program that binds the hardware and the software together means that the operating system is responsible for the recognition of each hardware device connected to the system and also responsible for the activation of the software and drivers which control the system.
No bootable device error comes in windows when the boot device which can be any form of storage device such as hard drive, USB flash drive, DVD, etc. cannot be located or the files in that device are corrupted. To fix this issue following methods can be helpful.
Fix No Bootable Device Error on Windows 10
Method 1: Fix by Setting Boot Mode to UEFI
By changing the boot mode to UEFI (Unified Extensible Firmware Interface) the problem of no bootable device can be solved. UEFI is a boot mode which is slightly different than other modes. Changing the boot menu to UEFI will not harm your computer so you can try it. Follow these steps.
1. Turn on your computer and keep on pressing the F2 key to open BIOS.
2. The boot mode options are usually located under the Boot tab which you can access by pressing the arrow keys. There is no fixed number of times you have to press the arrow key. It depends on the BIOS firmware manufacturers.
3. Find the Boot mode, press Enter and change the mode to UEFI.
4. To exit and save the changes press F10 and press enter on the option of saving changes.
5. After that, the process of booting will start itself.
Also Read: How to Check if your PC is using UEFI or Legacy BIOS
This is how you can change the boot mode to UEFI. After the UEFI boot mode is set & booting starts to check whether the error is still coming or not.
Method 2: Fix the boot information
If you are trying to boot the device and the error no bootable device comes then it can be due to the boot information, such as BCD (Boot Configuration Data) or MBR (Master Boot Record) of the system is corrupted or infected. To try to rebuild this information follow these steps.
1. Boot from a bootable device such as USB drive, DVD or CD with the help of windows installation media.
2. Select the language and region.
3. Find the option of Repair your computer and select it.
4. In the case of Windows 10, select Troubleshoot.
5. Advanced options will be open, then click on Command Prompt.
6. Type the below-stated commands as it is one by one and press Enter on the keyboard after each command.
bootrec/fixmbr
bootrec/fixboot
bootrec/scanos
bootrec/rebuildbcd
7. Press Y and then press Enter if asked to add a new installation to the boot list.
8. Exit the command prompt.
9. Restart the system and check for the error.
You may be able to fix No Bootable Device error on Windows 10, if not then continue with the next method.
Method 3: Fix the primary partition
Primary partition holds the operating system. Sometimes, it is possible that the error of no bootable device is coming due to a problem in the primary partition of the hard disk. Due to some issues, it is possible that the primary partition has become inactive and you need to set it to active again. To do so follow these steps.
Also Read: 6 Ways to Access BIOS in Windows 10 (Dell/Asus/ HP)
1. As mentioned in the above method open the Command Prompt from advanced options by selecting Troubleshoot.
2. Type diskpart then press Enter.
3. Type list disk then press Enter.
4. Select the disk where your operating system is installed.
5. Type select disk 0 and press Enter.
6. Each disk has several partitions, to see them type list partition and press Enter. The System Reserved Partition is the partition where the boot loader is present. Partition 1 is this partition about which we are talking about. The system reserved partition is normally the smallest in size.
7. Type select partition 1 and press Enter.
8. To activate the primary partition type active and then press Enter.
9. Type exit and press enter to exit diskpart and then close command prompt.
10. Restart the computer.
You should be able to Fix No Bootable Device Error on Windows 10 by now, if not then continue to next method.
Method 4: Reset the System
If all the above methods fail to resolve the problem then there might be some files in your system which are corrupted and are causing the problem. Reset the system and find out whether this fixed the problem or not. To do so, you need to first download the Microsoft’s Media Creation Tool for the particular windows version. After the downloading follow these steps.
1. Open the Media Creation Tool.
2. Accept the license and click on Next.
3. Click on Create installation media for another PC.
4. Choose the language, edition, and architecture.
5. Choose the media to use, for DVD select the option of ISO file and for USB select USB flash drive.
7. You can now plug this media into the system and reinstall your operating system.
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These were several methods to Fix No Bootable Device Error on Windows 10. If you have some queries or doubt then feel free to ask them in the comment section.
