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I already have windows installed and I just installed Ubuntu and I was expecting that it will ask me which OS to boot after startup but it didn't.

I refer the link but didn't work Windows 7 not showing up in boot after installing Ubuntu.

I set the option of Erase disk and install Ubuntu. But it says currently has no detected operating system. enter image description here

How to set this option now. I already have Ubuntu installed and I am not getting option to boot windows.

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2 Answers 2

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try the below command :-

sudo os-prober

sudo update-grub

reboot

Hope this helps!

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  • Nop didn't work.
    – eswaat
    Dec 15, 2014 at 5:39
  • I set the option of Erase disk and install Ubuntu. But it says currently has no detected operating system. Link to image as i can't upload because of less than 10 reputation.drive.google.com/file/d/0B8xCC50zlFkzRms3c3lQNm9STUk/… . So you think it formatted my Windows.
    – eswaat
    Dec 15, 2014 at 5:44
  • In that case, it has removed Windows. In case you wished to dual boot you have to chose "Something else". It will give you options to partition and you should proceed.
    – BDRSuite
    Dec 15, 2014 at 8:18
  • Can I recover some of the content of Windows.
    – eswaat
    Dec 15, 2014 at 19:32
  • Yes, from your backups.
    – SDsolar
    Mar 31, 2017 at 18:30
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If you have installation CD of Windows, you can repair the bootloader of Windows with the help of command line, typing the following code:

bootrec /fixmbr

It will restore the Windows bootloader for you.

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  • I set the option of Erase disk and install Ubuntu. But it says currently has no detected operating system. Link to image as i can't upload because of less than 10 reputation.drive.google.com/file/d/0B8xCC50zlFkzRms3c3lQNm9STUk/… . Still I can restore the Windows
    – eswaat
    Dec 16, 2014 at 0:00

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