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I dual boot windows 7 and 8 and I accidently converted my windows 8 disk to dynamic while I was in 7.

I used AOMEI Dynamic Disk Manager to turn it back to basic, but it removed my EFI partition. Now windows 8 won't boot.

Is there any way I can install the non-EFI bootloader on the windows 8 partition and use legacy mode?

Or recover the EFI partition?

Or create an EFI File on a usb - anything so I can boot back into my windows 8!!

Using the windows recovery CD or reinstalling isn't an option.

I need help fast to get the windows 8 booting again!

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  • Can you switch to a non-EFI installation at this point, no, you cannot.
    – Ramhound
    Apr 26, 2014 at 11:20
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    As I understand EasyBCD can help you. And maybe this is possible duplicate of this?
    – Jet
    Apr 26, 2014 at 14:09

1 Answer 1

Reset to default
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Easy fix.

Firstly, change the disk to MBR rather than GPT, make sure Windows 8 partition is primary.

Get a copy of bootsect.exe and bcdboot.exe from Windows Automated Installation Kit

Run bootsect /nt60 E: /s E: (change E: to Windows 8 Partition)

Run bcdboot E: /s E: (change E: to Windows 8 Partition)

What this does is changes the disk to MBR to allow BIOS booting, installs the bootloader and created a BCD store on the Windows 8 partition, allowing it to boot without the plague called UEFI. You will need to ensure legacy boot mode is enabled on your computer.

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