What will happen when i convert my file system from mbr to gpt?

Hi

Windows: System Disks

• Use the built-in MBR2GPT tool found in Windows 10/11 (version 1703 or later).

• Open Command Prompt as administrator and validate the disk:

  text

  mbr2gpt /validate /disk:0 /allowFullOS

• If validation succeeds, convert:

  text

  mbr2gpt /convert /disk:0 /allowFullOS

• After conversion, change BIOS settings to UEFI and reboot.

• For non-system drives, Disk Management and DiskPart require deleting all partitions, resulting in data loss.

• To avoid this, use third-party partition management tools such as Paragon Partition Manager CE,   EaseUS Partition Master or AOMEI Partition Assistant, which can convert data disks without deleting partitions.

Hopefully a painless operation.

Then the GPT is suitable for LINUX MINT or another OS like W11.

I'm trying to get on windows consumer ESU program because my processor isn't supported for windows 11. To get there, my pc needs Secure Boot, and TPM 2.0 must be enabled. To get there, I have to convert to gpt file system.

Hi codibelcalm:

Could you provide a link where you saw those system requirements? The original MS support article Windows 10 Consumer Extended Security Updates (ESU) program (now archived on the  Wayback Machine site) was replaced by the FAQ at https://www.microsoft.com/en-US/windows/end-of-support#FAQ3, and I don't see any mention of TPM and/or Secure Boot requirements in either of those support articles.

I can't guarantee the accuracy of the following quotes, but when I perform a Goolge search for "is mbr file system compatible with windows 10 consumer ESU program" their Gemini AI tells me:

"Yes, the Master Boot Record (MBR) file system is compatible with the Windows 10 Extended Security Updates (ESU) program because the ESU program provides critical security updates for the operating system itself, and the MBR file system is a foundational part of the storage architecture on which Windows 10 runs. The compatibility is not dependent on the disk partition style (MBR or GUID Partition Table/GPT), but rather on the Windows 10 operating system receiving updates ..."

A similar search with the Perplexity AI chat bot at https://www.perplexity.ai/ says:

"Yes, the MBR file system (referring to Master Boot Record partitioning and legacy BIOS systems) is compatible with the Windows 10 Consumer ESU program, as long as the PC can properly run Windows 10 version 22H2, which is the minimum requirement to enroll and receive updates from the ESU program. Windows 10 itself supports installation on both MBR and GPT partition schemes; the ESU program does not introduce new hardware or file system requirements beyond those for Windows 10 22H2" ...

It looks like your Win 10 Pro v22H2 machine received the September 2025 Patch Tuesday updates (rel. 12-Sep-2025) since you're currently at OS Build 19045.6332, so I'm not sure why your machine wouldn't qualify for enrollment in the Win 10 ESU program for home consumers with your current system configuration.

FYI, I installed my September 2025 Patch Tuesday updates and I still haven't seen a link at Settings | Update & Security | Windows Update to allow enrollment in the Windows 10 ESU program for home consumers.  I'm not overly concerned since this offer is still being rolled out gradually to Win 10 users, and I don't need to be enrolled until early November 2025 (i.e., just before the November 2025 Patch Tuesday updates are released on 11-Nov-2025). 
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Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.6332 * Firefox v142.0.1 * Microsoft Defender v4.18.25070.5-1.1.25070.4 * Malwarebytes Premium v5.3.8.212-140.0.5364 * Macrium Reflect Free v8.0.7783 * My Dell v2.2.6.0 * Fusion Service 2.2.14.0

I just now checked, and low and behold the option to enroll is available ... just enrolled at no extra cost. I'm covered now until October 13th, 2026.

I attached an image of the results from a PC Health Check scan earlier this month. The first step to meet the requirement Secure Boot (I believe) was to first enable UEFI on my computer, which I could not, without resulting in a startup failure. I didn't mention that part ...

Hi codibelcalm:

Thanks for the status update, and glad to hear you were able to enroll in the Windows 10 Consumer Extended Security Updates (ESU) program with your current system configuration.

The PC Health Check utility does confirm that your computer does not meet the minimum system requirements for Windows 11 (i.e., you cannot upgrade from Win 10 v22H2 to Win 11 v24H2) but, as you discovered, this does not prevent you from enrolling in the Windows 10 ESU program and receiving an additional year of security updates for your Win 10 OS. See Mayank Parmar's 26-Jun-2025 Windows Latest article Microsoft clarifies Windows 10 extended updates still work if Windows 11 is unsupported for more information.
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Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.6332 * Firefox v142.0.1 * Microsoft Defender v4.18.25070.5-1.1.25070.4 * Malwarebytes Premium v5.3.8.212-140.0.5364 * Macrium Reflect Free v8.0.7783 * My Dell v2.2.6.0 * Fusion Service 2.2.14.0