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Warning, this is potentially a process that may make your computer unbootable if done incorrectly, or if your BIOS doesn't support booting from UEFI. You should make a drive backup first.
Verify the computer supports UEFI/Secure boot before starting. Boot from a different system, or from a Win10 USB installer, into recovery mode then Command Prompt. Copy to Clipboard
mbr2gpt.exe /validate
Run Diskpart to find the disk number, change it in the below command if needed Copy to Clipboard
mbr2gpt.exe /convert /disk:0
Exit out, reboot, and set the computer to boot using UEFI/Secure Boot. This guide from Microsoft shows the steps to convert the boot method of your computer. https://answers.microsoft.com/en-us/windows/forum/all/convert-an-existing-windows-10-installation-from/aa8c2de3-460b-4a8c-b30b-641405f800d7 https://www.windowscentral.com/how-convert-mbr-disk-gpt-move-bios-uefi-windows-10 |