Although this issue is not very common, I will explain to all our readers how you can fix it and prevent it from happening in the future. The error message that you might get is this: No boot disk has been detected or the disk has failed. But you don’t need to be alarmed because in the majority of the cases your disk is not broken. The first step you should take is to check if you can boot into Ubuntu. If you can, then it is a Windows 8 or a Windows 10 issue and you can fix it by following the steps listed below.

What can I do if Windows 10 won’t boot after Ubuntu install?

1. Use diskpart

2. Additional solutions

If the steps listed above did not solve your problem, here are some additional solutions that you can use:

Download and install Boot Repair. With the help of this tool, you can repair boot errors on dual-boot machines. You can use it when you can’t boot Ubuntu after installing Windows 10, or when you can’t start Windows 10 after installing Ubuntu. Boot in UEFI Mode. If you don’t use this boot mode, you may experience various boot issues when launching your Windows 10 OS. Keep in mind that OEMs usually install Windows 10 in UEFI mode by default. If you install Ubuntu in legacy mode, you won’t be able to boot to Windows 10 simply because you installed the two operating systems under two different modes. Make sure that both operating systems are installed in UEFI mode so that you can boot booth of them.

After the restart everything should be back to normal and you should be able to boot into Windows with your Ubuntu still running. If you have any questions on fixing your Windows 8 or Windows 10 after installing Ubuntu, use the comments below to let us know.

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