Trying to convert MBR to GPT in Windows 10 - Still Unsolved

Question

I very much appreciate your help. (https://learn.microsoft.com/en-us/users/na/?userid=432e03d6-efbc-40d3-9268-bcacdada6246)

I moved the Assessment and Deployment Kit and Windows Performance Toolkit back from the Desktop into "Windows Kits" .

I have followed your instructions to get an Administrator command prompt (i.e. C:\WINDOWS\system32>) and entered the following command as per the file path on my computer:

cd "C:\Program Files (x86)\Windows Kits\10\Assessment and Deployment Kit\Deployment Tools\amd64\Oscdimg"

I then entered:

oscdimg -n -m -bC:\path\to\boot\etfsboot.com C:\path\to\WinPE\ISO C:\path\to\WinPE\WinPE.iso

I got this error message: Could not open boot sector file "C:\path\toboot\etfsboot.com"

Error 3: The system cannot find the path specified.

When I click on etfsboot I get the following " This app cannot run on your PC. To find a version for your PC check with the software publisher"

Not sure where to go from here....

I am not sure if I have installed the right Assessment and Deployment Kit and Windows PE.

My computer has Windows 10 Pro, Version 22H2 installed, and

Windows feature Experience Pack:1000.19041.1000.0 on a 64-bit computer with 64-bit operating system.

The 2023-05 Cumulative Update for windows 10 Version 22H2 for a 64-bit operating system (KB5026361) has been installed.

When I look at the ADK downloads in lists Windows 11 22H2, (but not Windows 10 22H2).

Then it lists ADK for Windows 10, version 1903, and the Windows PE add-on for ADK, version 1903. This is what I have downloaded, but was this correct?

Answer 1

Hello there,

Converting a disk from MBR (Master Boot Record) to GPT (GUID Partition Table) can sometimes be a complex process, but there are several methods you can try. If you're encountering issues or the conversion isn't working, here are some troubleshooting steps you can follow:

Using Windows Built-in Tools:

Disk Management: Windows has a built-in tool called "Disk Management" that allows you to convert a disk from MBR to GPT, but this method requires deleting all existing partitions on the disk. Ensure you have backups of your data before attempting this.

Press Win + X and choose "Disk Management."

Locate the disk you want to convert, right-click on each partition, and choose "Delete Volume" until all partitions are removed.

Right-click on the disk and choose "Convert to GPT Disk."

Using Command Prompt:

You can also use the command-line tool "diskpart" to perform the conversion. This method also requires deleting existing partitions, so back up your data first.

Press Win + X and choose "Command Prompt (Admin)."

Type diskpart and press Enter.

Type list disk to see a list of disks. Identify the disk you want to convert.

Type select disk X (replace X with the appropriate disk number).

Type clean to remove all partitions on the disk.

Type convert gpt to convert the disk to GPT format.

I used AI provided by ChatGPT to formulate part of this response. I have verified that the information is accurate before sharing it with you.

Hope this resolves your Query !!

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