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Difficulty: HardOS Installation and Upgrade Methods

An IT technician is preparing a fleet of enterprise desktop computers running 64-bit Windows 10 Pro for an automated upgrade to Windows 11 Pro. During pre-upgrade auditing, the technician discovers that several target systems are configured with legacy BIOS mode and Master Boot Record (MBR) partition tables, despite having UEFI-capable motherboard firmware. The upgrade requirements stipulate that the system drive must be converted to GUID Partition Table (GPT) to support UEFI boot mode without losing user data or reinstalling the operating system. Which of the following command-line utilities should the technician run within Windows prior to initiating the operating system upgrade?

  1. mbr2gpt /convert /allowFullOSAnswer
  2. B
    diskpart followed by clean and convert gpt commands
  3. C
    bootrec /rebuildbcd
  4. D
    fdisk /mbr /convert

Answer

Execute mbr2gpt /convert /allowFullOS in the command prompt prior to switching firmware to UEFI mode.
The correct answer specifies using the MBR2GPT tool with the /convert and /allowFullOS switches. Windows 11 mandates UEFI firmware mode, which requires the operating system boot drive to use the GPT partition style. MBR2GPT is designed specifically to convert an MBR system disk to GPT without altering or erasing data on the disk, making it the appropriate pre-upgrade utility.

Step-by-Step Solution

1
Identify the prerequisite requirement for upgrading to Windows 11.
Windows 11 requires UEFI boot mode with GPT partition style.
Systems currently running in legacy BIOS mode with MBR must be converted to GPT before the upgrade installer will proceed.
2
Select the non-destructive disk partition conversion tool native to Windows 10.
mbr2gpt.exe is the built-in Microsoft tool designed specifically for converting MBR disks to GPT without data loss.
Traditional tools like diskpart require wiping the drive, whereas mbr2gpt preserves partitions and data.
3
Apply the appropriate syntax switches for running within an online Windows environment.
The /convert switch executes the conversion, and /allowFullOS allows the tool to run inside full Windows 10 rather than WinPE.
Executing mbr2gpt /convert /allowFullOS successfully converts the system disk style online.

Key Concept

MBR to GPT disk conversion using MBR2GPT tool for UEFI and OS upgrade prerequisites
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Topics

OS Installation and Upgrade Methods

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