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Convert from BIOS to UEFI with MBR2GPT

Applies to: Windows 10

Learn how to convert a disk from Master Boot Record (MBR) to GUID Partition Table (GPT) partition style, without modifying or deleting data on the disk, as part of a migration from BIOS to UEFI. The MBR2GPT tool works within the Windows Preisntallation Environment (Windows PE) or within the WIndows 10 operating system, and the migration from BIOS to UEFI can take place during an in-place upgrade from Windows 7 or Windows 8 to Windows 10, version 1703.

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