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AYoun13
Beginner
563 Views

How do you enable UEFI boot on NUC7i5BNH?

I am trying to enable disk encryption using TPM/PTT. I get an error message that the system can only enable TPM in UEFI.

 

When I go into the BIOS, UEFI says "no boot Disk", Legacy reports my SATA SSD. If I disable the legacy boot, it fails to boot. If I enable both, it ends up in legacy.

 

Suggestions?

 

BTW, I have not opened the NUC, but I think it is an M.2, but the M.2 setting in the bios has not identified the disk.

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9 Replies
AlHill
Super User
119 Views

Just turn on UEFI. Of course, you will have to install your OS in UEFI mode.

 

Doc

 

LeonWaksman
Super User
119 Views

  1. Your Windows is probably installed with MBR (legacy) partition. It should be installed with GPS partition.
  2. You may check the kind of partition you have in Disk Management:
  3. Open Disk Management and locate mouse cursor in the bottom part on the disk name.
  4. Right mouse click and choose Preferences.
  5. On the Volume tab you will see the partition type (see the image attached)
  6. If your partition is indeed of MBR type you may convert it to GPT. However perform a disk backup before converting.

 

Leon

 

 

SChau10
New Contributor II
119 Views

If OS is Windows 10, there’s a way to convert the system from legacy/MBR disk structure to UEFI/GPT, using the Microsoft MBR2GPT utility, without needing to re-install Windows:

 

  1. Boot to Win 10 in legacy mode and disk still in legacy/MBR structure.
  2. Launch command box in administrator (elevated) mode.
  3. Run MBR2GPT utility with /convert and /allowfullOS options. Wait for conversion to complete.
  4. Restart system & enter NUC Visual BIOS (F2).
  5. Enable UEFI checkbox under Boot. May also need to disable Legacy.
  6. Save & exit from Visual BIOS.
  7. NUC should now boot Win10 in legacy mode!

 

LeonWaksman
Super User
119 Views

  1. There are more method how to convert MBR partition to GPT. You may easy to see if you search in Google "convert MBR to GPT windows 10" . However, first you must find if you are really on MBR partition. there are additional methods to method mentioned in my post to do this: https://www.tenforums.com/tutorials/84888-check-if-disk-mbr-gpt-windows.html
  2. I believe that the paragraph 7 in the @SChau10​ post should read: "NUC should now boot Win10 in UEFI mode!"

 

Leon

SChau10
New Contributor II
119 Views

Leon,

 

Thanks for the correction! I was thinking UEFI but typed legacy!

 

Corrected procedure:

  1. Boot to Win10 in legacy mode and disk still in legacy/MBR structure.
  2. Launch command box in administrator (elevated) mode.
  3. Run MBR2GPT utility with /convert and /allowFullOS options. Wait for conversion to complete.
  4. Restart system & enter NUC Visual BIOS (F2).
  5. Enable UEFI checkbox under Boot. May also need to disable Legacy.
  6. Save & exit from Visual BIOS.
  7. NUC should now boot Win10 in UEFI mode!

 

I second the recommendation to do a backup before the conversion. It's always better to be safe than sorry!

 

n_scott_pearson
Super User Retired Employee
119 Views

It should go without saying - but I will say it anyway: Make a backup of your data (or better the whole disk) before running this utility!

...S

LeonWaksman
Super User
119 Views

Of course Scott, you are right. Always make backup before such major action. That's why I mentioned this in my post above. 😊

 

Leon

 

n_scott_pearson
Super User Retired Employee
119 Views

Usually Al beats me to the punch, but not this time!

AlHill
Super User
119 Views

I even keep backups of backups<G>

 

Doc

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