From Drive partition to Windows boot mode.

MBR: Master Boot Record
GPT: Guid Partition Table

1. Convert between 2 types when install Windows

1. Open the cmd gg this or press the Shift + F10

2. Enter disk part

diskpart

3. List all disks

list disk

Pay attention at the column Gpt, if it has a * then it’s Gpt.

4. Select the disk you want to convert

select disk 0 # or whatever disk number you want in the list

5. Clear the disk (required)

Make sure you backedup your data, otherwise they’ll gone.

clean

6. Convert to MBR or vise versa

convert mbr # to convert from Gpt -> Mbr
convert gpt # to convert from Mgr -> Gpt

All done. You can exit the cmd to continue with your setup.

2. Legacy vs UEFI

Read more at this.

So basically, if you want to use UEFI mode, then your drive must be a Gpt partition.

Boot mode	Partition
UEFI	GPT
Legacy/Bios	MBR

3. Create UEFI usb boot

More at Creating Windows UEFI Boot-Stick in Windows

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