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First I installed Windows 10 on my system. Then I installed Ubuntu. After the installation is complete, I rebooted and grub came up and I booted into Ubuntu without an issue.

Next I re-booted and went into Windows. Then again tried to reboot and Grub won't show. I was taken directly to Windows. I even picked Ubuntu from the boot menu. Still go to Windows.

In windows, if I open the windows partition editor, it won't show the ubuntu partitions. In my other machines, they are shown as raw. Any idea whats happening? Tried boot repair and also disabled secure boot. Nothing is working :-(

  • Have you taken out USB at the time of reboot(after installation)? – Ashu Feb 26 '16 at 16:00
  • @Ashu No I haven't – THpubs Feb 26 '16 at 16:01
  • That means you might have either installed in USB itself or may be you were trying ubuntu rather than installing. – Ashu Feb 26 '16 at 16:01
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    Just got it fixed! Ran boot repair in advance mode.. Set it to re-install grub. Repair Windows boot files, Also un-ticked secure boot. Now its working! Any idea what happened? – THpubs Feb 26 '16 at 16:15
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    Possible duplicate of Can't boot into Ubuntu in Windows 10 / Ubuntu dual boot – karel Aug 4 at 8:14
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You will need to run a boot repair from a Windows media disk/USB. When you go into Advanced mode run the repair and reboot.

I've seen Windows for some reason overwrite/corrupt the boot loader. Some instances I have received only the grub menu, or grub screen without one of the options, like loading Ubuntu or Windows. Usually once you repair the boot file it will work going forward.

  • Then the OP should edit his post to reflect the solution or use the "Answer your question" and not hide the answer in comments. I just saw his answer because it's like the 6th one deep. – Joe VanHorn Apr 21 '17 at 4:29
  • Odd in deed. Thanks for voting to close the question. – Joe VanHorn Apr 21 '17 at 4:44

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