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In a computer there were two separate Windows 10 installations on two different Hard Disks. But the boot files were in Hard Disk 1.

Now Hard Disk 1 is formatted completely and the Windows 10 on it is reinstalled. But this new installation could not recognize the Windows installation on Hard Disk 2. How can I revive the Windows Installation on Hard Disk 2? Is there any boot manager to fix it?

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It is probably not listed in the BCD file as the old one was deleted and the new one only contains the new installation.

I use a tool called Visual BCD to edit my BCD files.

Take a look at here at a tutorial and some more information:

How to use BCDEdit to dual boot Windows installations?

How to add a new OS entry via BCDEDIT?

  • Visual BCD fails. Also it seems it is designed for Win 7 -. – nano Aug 3 '16 at 11:32
  • Oh right, did not know. I have used it on 8.1 successfully. Windows actually has it built in, it is just that it is command line and a bit trickier to use. – Bitten Fleax Aug 3 '16 at 12:47

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