MBR to GPT conversion isn't working—can you get some assistance?
MBR to GPT conversion isn't working—can you get some assistance?
I made all the necessary changes on my PC for Windows 11 to work properly (the built-in check tool confirmed it). After the official update appeared, I saw the download and install option, but when I tried to proceed, a pop-up appeared: "Unsupported disk layout for UEFI firmware." I discovered I need to change my OS partition from MBR to GPT. I attempted the conversion but got stuck with the error message about not finding the OS partition. Any quick solutions would be appreciated. Thanks!
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I tried this process, though I had to turn on Windows manually (not very easy). First, go to Advanced Startup by opening the Start Menu, pressing Power, holding Shift and clicking Restart. A menu will appear—select Troubleshoot > Advanced options > Command Prompt. Choose your account and enter the password if asked. Once the Command Prompt launches, run mbr2gpt /validate and press Enter. After completion, your disk will switch from MBR to GPT format. Some users suggest using this tool within Windows, but it’s risky and may cause issues. If you must use it in Windows, add /allowFullOS after each command. You can also specify the disk with /disk:X, like mbr2gpt /convert /disk:1 for the first drive.