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I was running a dual-booted Ubuntu/Windows 8.1 PC. I deleted my Ubuntu partition so I could install Arch, but in doing so I also accidentally messed up Grub and deleted my Windows EFI partition. I spent some time trying to restore the EFI partition, but I'm wondering if I could fix all of this by reinstalling Grub. Is reinstalling Ubuntu the easiest way to fix this? I can't reformat the drive because I have important work there that I can't lose.

I'm at school right now so I won't be able to post any logs until around 3:30 CST. Any advice would be greatly appreciated.

Edit: My problem extends beyond deleting Ubuntu. I accidentally messed up my windows filesystem and now it won't boot. It starts up and says there is no OS. I believe the best way to fix this would be to reinstall Grub but I need some confirmation of this.

2 Answers2

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Install Ubuntu again using bootable USB.

Check this link or link

Karlos
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Plug in a windows bootable pendrive or CD and then select the repair after you click the next then go to troubleshoot and then there will be an option for choosing command, go to command and type this: bootrec.exe/fixmbr press enter then it will show successful and then type : exit then start the windows.... Hope this works, cause mind does for the same problem i faced.