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I have Debian 7 installed on my laptop on the ssd and windows 8 on the hdd. Currently to boot Windows I go into the bios and change a boot setting from legacy to UEFI, which means to boot Debian I am using the legacy option. When I originally installed Debian I recall it being a pain to work with UEFI so that is why I did it this way.

My question is, now that I have more time, is it possible to switch the Debian install so that it can dual boot with windows under UEFI?

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Yes, you have to have both os's as the same, either UEFI or MBR/Legacy. You cannot have Linux legacy and 8 uefi.

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  • For a while I did have both UEFI Windows 8 and MBR Debian 7. The way I switched between them was by changing my settings in BIOS from UEFI to MBR and vice versa. – 0x41414141 Jun 5 '14 at 22:01
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I ended up doing this by uninstalling Grub and installing rEFInd. This was a very painstaking procedure and many times I had to use Super Grub Disk to boot back into Linux. But it does work now.

I followed the procedure at http://www.rodsbooks.com/refind/installing.html

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    Whilst this may theoretically answer the question, it would be preferable to include the essential parts of the answer here, and provide the link for reference. – slm Sep 30 '15 at 3:05
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A short step by step howto can be found here:

Switch Debian 7 wheezy from legacy to UEFI boot mode

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  • Please provide the details here, and use links for pointers to non-relevant details and/or backup information. Currently if the link goes dead your answer loses any of its value it might have. – Anthon Oct 27 '14 at 9:17
  • Provide your answer here not the link. – Ruban Savvy Oct 27 '14 at 9:56
  • It's just a link but it's a good one. – mpr Jun 26 '18 at 16:54

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