UEFI vs BIOS Windows 10

Hey guys! I am planning to install Windows 10 on my Lenovo Y50 with a WD Black2 dual drive and AUO B156HAN01.2. I currently have Windows 7 Ultimate 64-bit installed on BIOS (should have done the UEFI installation this summer), and I have burned the Windows 10 Pro 64-bit DVD. I have a few questions regarding my install.

1. I would like to convert my OS from BIOS to UEFI before my installation. I know that just changing my motherboard settings to only use UEFI OS'es will block my BIOS-installed Windows 7 from working, which means if I install Windows 10, I will not have a "genuine copy." Therefore, how can I go from BIOS Windows 7 to UEFI Windows 10?

2. Can UEFI install from disc? Or do I have to have a USB flash drive for it?

3. Does formatting the MBR to GPT require a backup of data? Is there a non-destructive way to convert?

Thank you in advance!

 

1 - Use gatherosstate.exe from the Windows 10 DVD, this allows you to perform a clean install and still get the free upgrade activation. See instructions: http://forums.mydigitallife.info/th...ut-going-through-the-complete-upgrade-process

 

@vistastructions
You can convert your existing Windows installation from BIOS/MBR to UEFI/GPT prior to installing 10 using this guide. I did it yesterday and confirm everything's great.

 

How did you do that? And did your conversion destroy all your data?
So, if you are saying that you actually converted your Windows 7/8.1 from BIOS to UEFI and everything remained the same and Windows was still activated, can you show me how to do that? I'd like to do that ASAP actually!

 

@vistastructions,
I just followed all instructions in the link, and my system remained functional, without data or activation loss. Used a flash drive with Windows 7 Ultimate installation, however, not sure if Windows 10 installation disk will do - but if not you can always download a Windows 7 installation/recovery disk.