How to change Legacy to UEFI in Bios NUC7i5BNB

[Piyush_12]

Hello I want to convert my Intel NUC7i5BNB from Legacy boot to UEFI boot but I can't find it in the bios can any one guide me please ?

[LeonWaksman · Accepted solution]

1. In BIOS settings: Advanced>Boot>Boot Priority, check the UEFI boot on L.H. panel.

2. You need to know that in order to enable UEFI boot, you drive should have GPT partition, rather then MBR. To convert the partition from MBR to GPT, without loosing your data, use mbr2gpt utility.

Leon

[Piyush_12]

Hello I converted my disk from MBR to GPT using mbr2gpt tool and I located the UEFI option in the bios and it was enabled by default. After booting in Windows 10 my OS is destroyed now. Its letters are dissapeared from every where and in the task manager I can only see the pictures and not a single text. If I try to open cmd it crashes after opening it. Was I suppose to disable the Legacy Boot option in the boot menu where I enabled UEFI Boot ?. Also I am re-installing a fresh copy of Windows 10 so what options should I enable or disable in the bios ? Can you please guide me ? 

[LeonWaksman]

You did OK. If both boot option are enabled BIOS is attempting to booth trough the UEFI boot option before using the Legacy. I don't know, why you Windows was corrupted after changing the partition type. You may try to boot if SAFE mode and this may fix it .

Any way this is a guide to install Windows from scratch.

1. I suggest you install Windows using the following method:
2. Please prepare your installation media (you need 8GB – 32GB USB stick), using Microsoft Media Creation Tool. This will install the latest version.
3. Your bios should be set to default settings. Enter bios (press F2 during boot) and then press F9 (Y) to set defaults and F10 (Y) to save settings and exit.
4. With the installation media inserted into the rear USB slot, power ON your NUC and repeatedly press F10 to get Boot Menu.
5. In this menu, choose the UEFI option of your Installation media.
6. Follow this tutorial to continue with installation.
7. In para. 9 you may enter the Product Key from the Microsoft Distribution you bought .
8. Skip on para. 14 and continue in para. 15. Important, do not format the drive where you want to install Windows, rather delete all existing partitions from this drive, till you see one unallocated space.
9. Press Next and continue with the installation

Leon

[Piyush_12]

So as you said there is no need to change any bios settings just change it to system defaults. OK. I have 3 partitions on the hard drive now,

1st is Windows created recovery partition (500mb).

2nd is the C:- drive Containing the existing Windows files.

3rd is the D:- drive which has nothing in it.

So now I have 2 doubts:-

1) Will be the windows created recovery partition visible to me while installing windows ? So that I can wipe it.

2) I will format the C:- partition where the windows files are and then install the new copy of windows on the same partition. Will I face any issue later or do I have to compulsory delete the C:- drive first and then install the new windows on that unallocated space ? Thankyou for giving your time to me.

[LeonWaksman]

If I understand you correctly, you have only one drive in your NUC, containing partition C:, and the Recovery partition. All the three partitions will be visible during installation (see the second image in para. 15 of the Tutorial I give you the link). All the three partitions need to be deleted before starting the installation to have one unallocated space on this drive (in this space you will install Windows). Therefore, you will of course, loose all programs and data from partitions C: and D:, your drive will be erased.  You need to backup your data before starting this process. The Recovery partition and the C: partition will be recreated during installation. After finishing the installation, using Disk Manager, you may shrink the C: Partition on the drive and then you may create partition again. 

Leon

[Piyush_12]

Thankyou I will install it and do a bios update later because I currently do not have a free usb. Its now containing a copy of Windows10.

[LeonWaksman]

It is advisable to have updated BIOS before installing Windows.
Leon

[Piyush_12]

I currently do not have a free usb drive. Can I update bios from a SD card because I also cannot run the Windows version means (.msi) because my Windows is so curruted that my pc can't even restart and even shutdown. If I shutdown the pc, it just turns off the screen for 3 seconds I am brought back to my desktop by its self and if I restart the pc the windows loading screen keeps going on . I have to press the power button to just hardware shutdown it.  

[LeonWaksman]

I'm not near my computer now and I'm answering from my mobile. Try to install Windows (it takes about 15-20 minutes) and then update the Bios.
Leon

[collins52]

1. Typically, you continuously press a specific key when the computer starts up to enter the EFI Setup menu. ...
2. Normally, you can find the Legacy/UEFI boot mode configuration under the Boot tab. ...
3. Now, press F10 to save the settings and then exit.