I had Windows 10 installed on my PC then I created a new volume from C drive and then installed Ubuntu from live environment.

It said installations successful and everything OK. But after restart no Windows options were found in Grub menu. So I shut down by pressing switch. Then when I restarted PC it booted in Windows. And then I couldn't find the hard disk on PC.

I went to device manager found the disk but it was not showing anything may be unallocated. I tried to assign letter or anything else, but no option was available.

  • Windows is not able to read Linux filesystems, so this is absolutely normal and expected behaviour – Kev Inski Jun 17 '16 at 18:38
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    Kev is right. Get into Ubuntu, open GParted and you will see ALL partitions (windows + linux). Might be a little shocked at first, and you may discover hidden Windows partitions (like EFI, reserved or recovery). That's normal, nothing wrong with that. – ipse lute Jun 17 '16 at 18:45
  • so... now only thing I need to do is fix my grub installer right? – Sama E Shan Shoummo Jun 17 '16 at 18:48

Windows tools can't read Linux filesystems as Kev says. Your next step, as you guessed, is to fix GRUB. There's a dandy tool called "Boot Repair" that is designed to fix such problems. Here's a How-To Geek article about how to use it, and here's the official Ubuntu documentation. Good luck, and let us know how it goes in the comments!

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