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I was trying to dual boot Ubuntu 13.10 alongside Windows 8 using a LiveUSB but when attempting to install Ubuntu, it didn't recognize my Windows 8 install.

I did a couple things trying to get it to recognize it from this link and also tried zapping GPT structures as well. I believe when I zapped the GPT structures, bad things happened.

Now Windows 8 will not boot but says it needs to be repaired. It references the winload.efi file missing or something.

I tried making a Windows recovery USB, but it is unable to refresh because the drive is locked, and it will not reset because a required drive partition is missing.

I never ended up going through with the Ubuntu install just to make sure everything else stayed put. I can see all my old files and all the old partitions are still there.

How can I fix this?

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Can you please run GParted in Ubuntu and post a screenshot of the partitions (through a link to dropbox or something)?

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Zapping the GPT data structures was almost certainly a mistake. The reference to winload.efi makes me think you had an EFI-booting Windows installation. If your computer came with Windows 8 pre-installed, this is further evidence of an EFI-bootable Windows. Such an installation would require GPT, so by zapping the GPT data, you've erased your partition information.

If this hypothesis is correct, your best bet is to use a tool like TestDisk to recover your partitions. That said, posting your partition information (what you get when you type sudo parted /dev/sda print or sudo gdisk -l /dev/sda in an Ubuntu Terminal window) will give more information about the current state of your disk. It's conceivable that something less radical and risky than using TestDisk will fix the problem.

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