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First of all, I know a lot of people has asked this question, but after revising a lot of questions, I didn't find my answer so I ask here because I'm desesperated and I need a solution... Here's my problem:

I have Windows 8.1 preinstalled in my PC, and I've also installed Ubuntu 12.04. Firstly, when I installed it, it worked perfectly and I didn't have any problem running the two OS.
But, lately, this last week, it gave me some errors because I couldn't start Ubuntu, so I reinstalled it. The problem now is that when I try to access my Windows 8.1, it gives me this error:

Error: no boot disk has been detected or the disk has failed.

When I enter my BIOS settings, it successfully shows the Windows Boot Manager under the boot menu options, but when I try to access it, it gives me that error. Also, I've tried to solve the problem with the Windows 8 recovery mode but it doesn't detect my OS... I know my hard drive is working, because I can access to my Ubuntu and I can also access my Windows 8 files through Ubuntu.

I've found this guide but I'm not sure if it's what I have to do, is it? If this could solve my problem, I'm stucked in the first step where I have to assign my EFI partition a drive letter, because I don't know which volume is my EFI partition.

So, I would appreciate it a lot if you could help me because I really need to access my Windows 8.1 without losing any data...
Thanks!

peregraum
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3 Answers3

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Follow this`Ubuntu community page for your problem. It can surely helps you in a long way.And if any problems occurs after these steps please comment below .

ankeet_
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Maybe you can look via Gparted how big your EFI-partition is and then identify it simply by the size.

Simon I
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When your system boots up hit f12 repeatedly a few times to get an os selection menu. Select windows 8 boot manager there and hit return key. Your windows 8 os should start normally. Worked for me.

Swastik
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