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Anonymous50
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Message 1 of 3
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HP 15 Notebook BIOS

HP Recommended
HP 15 Notebook
Microsoft Windows 10 (64-bit)

First, I want to change to UEFI. My repair guy changed it to Legacy. Second, in Legacy, why can't I enable Secure Boot? And third, whenever I try to change it in mbr2gpt cmd, it always shows this:

C:\WINDOWS\system32>mbr2gpt /allowFullOS /validate
MBR2GPT: Attempting to validate disk 0
MBR2GPT: Retrieving layout of disk
MBR2GPT: Validating layout, disk sector size is: 512 bytes
Disk layout validation failed for disk 0.

But why? It was previously UEFI. Why can't it change?

2 REPLIES 2
Paul_Tikkanen
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Message 2 of 3
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HP Recommended

Hi:

 

You can't switch the BIOS from legacy to UEFI because it uses a different boot structure.

 

Since the MBR2GPT command is not working (it didn't work for me either), you will have to install W10 in EFI mode.

 

To do that, boot your W10 installation flash drive from one of the EFI boot sources (DVD or USB flash drive).

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Anonymous50
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Oh

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