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Summary :

dual boot option not showing in windows 10

Does your computer boot directly into Windows without showing dual boot options? If so, you can read this post, in which MiniTool offers you 4 methods to solve this problem.

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For some purposes, you may need to dual boot two operating systems like Windows 7 and Windows 10, Windows 8 and Windows 10, a Linux OS and Windows 10, etc. However, some of you may encounter dual boot option missing problem.

I have installed Windows 7 and Ubuntu in dual mode in different drives. I replaced Windows 7 with Windows 10. Now only Windows 10 boots; it's not showing the Ubuntu option at boot time. How can I solve this problem? --- askubuntu.com

Then, how work around this problem? Read the following content to get 4 solutions, which will help you deal with dual boot option not showing in windows 10.

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Fix 1. Disable Windows Fast Boot

If your computer boot directly into Windows 10 without dual boot options, you can try deactivating fast boot function of Windows 10 and then restart your PC. Here is what you should do to disable fast boot after you boot into Windows 10.

Step 1: Click Start button and click Settings icon. Choose System and navigate to Power & sleep. Then, click Additional power settings.

Power & sleep settings

Step 2: Click Choose what the power button does. Then, click Change settings that are currently unavailable. Finally, uncheck Turn on fast startup and click Save changes button.

uncheck Turn on fast startup

After turning off the fast startup, you can then restart your PC to see whether the problem is solved.

Fix 2. Repair via Command Prompt

Step 1: Press "Windows + X" keys to open shortcut menu. Then, click Command Prompt (Admin).

Step 2: At the command prompt, enter the following command: bcdedit /set {bootmgr} path \EFI\ubuntu\grubx64.efi. Then, hit Enter on your keyboard. After that, type Exit to close the command prompt window.

bcdedit /set {bootmgr} path EFIubuntugrubx64.efi

Step 3: Restart the computer to see whether the problem is solved.

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Fix 3. Try Advanced System Settings

Step 1: Press Windows key and type: view advanced system settings. Then, hit Enter to open System Properties window Advanced tab.

Step 2: Under Startup and Recovery section, click Settings. Expand the Default operating system list box and select the other operating system. Then, click OK to save changes.

choose default operating system

After that, reboot your computer to see whether the dual boot option reappears.

Fix 4. Repair System Files

I have searched some forums and posts. Many people would like to recommend two tools: EasyBCD and Boot Repair. Some people report that they have solved this problem by running them. But I notice that a user reported the tool solved the problem by repairing a system file.

If so, you can repair the system file without these tools, because Windows have offered commands to help repair system files. Here is the tutorial:

Step 1: Type "command prompt" in Windows search box. Then, right click the Command Prompt icon and select Run as administrator.

Step 2: Type "sfc /scannow" and press Enter key.

If the SFC command fails to repair system files, you can run DISM. This command should be run when your computer is connected to network. The DISM command lines are as follows:

  • exe /Online /Cleanup-image /Scanhealth
  • exe /Online /Cleanup-image /Restorehealth

After repairing system files, you can then restart PC to see whether the problem is solved. If not, you can then try these two tools.

Note: The above methods is available when you can boot into Windows. If your computer boot directly into other systems without showing Windows option, you should consult other forums like Ubuntu.

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