Windows 10: Unable to convert disk format from gtp to mbr after windows 10 installtion

Dear Team,Recently I have installed the windows 10 after uninstalling Ubuntu and Windows 10 installation was successful with out any isue.But im unable to create partition of C drive as my disk format is showing in GPT and im unable to convert it to MBRPlease suggest how to resolve this issue ?

:)

 

MBR TO GTP AND DOS TO UEFI

Hi Diana-Morrissey

I'm Wilfredo S an Independent Advisor

You can read this

- Convert HD from mbr to gtp

Converting to GPT format using Command Prompt in Windows Setup

Power off the PC, and insert/connect the Windows installation DVD or USB key.

Power on the PC and tap F12 key until One-Time Boot Menu appears.

Select the Windows installation DVD or USB in the menu and press Enter key.

From the Windows Setup screen, press Shift + F10 key to open a Command Prompt window.

In the Command Prompt window, type diskpart and press Enter key.

To identify the disk drive to reformat, type list disk and press Enter key.

To select the drive and reformat it, type select disk # (substitute # with the actual disk number e.g. select disk 1) and press Enter key.

Type clean and press Enter key.

Type convert gpt and press Enter key.

Type exit and press Enter key.

Close the Command Prompt window. If you are installing Windows, continue with the Windows Setup process.

Source>
https://www.dell.com/support/article/en-us/sln2...

How to Convert Windows 10 from Legacy BIOS to UEFI without Data Loss

https://www.tenforums.com/tutorials/81502-conve...

Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised
on the site before you decide to download and install it.

I hope it helps you

 

How to convert an MBR disk into a GPT disk

Hi,

Thanks for the reply.

This is an unexpected behavior, after you convert the disk from MBR to GPT, it shouldn’t convert back automatically, however you can try to convert the disk back to GPT format if you are on Windows 10 version 1703 or later using the inbuilt utility
MBR2GPT.EXE.

• Click on Start menu (Windows logo), type
  CMD.
  
• Right click on Command prompt and select
  Run as administrator.
  
• Type MBR2GPT /validate /AllowFullOS
  
• Once the validation is successful, execute the following command and check the results.
  
• Type MBR2GPT /Convert /AllowFullOS
  
• Once the conversion is successful, you must boot the computer into BIOS and change the BIOS mode to
  UEFI.
  

Disclaimer: Modifying BIOS/ complementary metal oxide semiconductor (CMOS) settings incorrectly can cause serious problems that may prevent your computer from booting properly.
Microsoft cannot guarantee that any problems resulting from the configuring of BIOS/CMOS settings can be solved. Modifications of the settings are at your own risk.

For more information about MBR2GPT utility, please refer to the article:
Convert MBR disk into GPT using MBR2GPT.EXE

Hope it helps.

Thanks,

Peer Samie

Microsoft Community-Moderator

 

Convert only one partition on the disk from MBR to GPT

Step 2
Convert MBR to GPT without data loss