Forum Discussion

Daniolle's avatar
Daniolle
Iron Contributor
May 28, 2026

Can't boot to Windows 10 computer

So on my MacBook I have bootcamp Windows 10 e everything fine until I try to install Linux I installed Ubuntu then windows shat itself I wouldn't want to boot I checked out other posts and that didn't help but booting it through grub will make my fans go bananas and shows a black screen

I tried refind but then I booted my install media and clicked repair computer chose startup repair then it said it couldn't

I went back to Linux type a bunch of commands

back to Windows pre then more commands and it wouldn't work.

now I did disk part

list vol

and my EFI partition didn't show up

so I did list part and there it is

so I tried bcdboot didn't work

l did list disk and released disk 0 aka my main disk is not gpt ??

windows Can only install to gpt on EFI????

I think that's the issue

I need help

2 Replies

  • Creediin's avatar
    Creediin
    Copper Contributor
    May 29, 2026

    After fixing Windows, your Option key menu will show Windows and "EFI Boot" (Ubuntu). However, Windows will boot by default until you change it.

  • Truimtp's avatar
    Truimtp
    Copper Contributor
    May 29, 2026

    Don't worry about the "not GPT" message you saw in DiskPart. On a Mac with Boot Camp, the drive uses a GPT partition scheme with a special "protective MBR" to fool Windows into booting . Linux disk tools often wipe out the "protective MBR" or the specific flags Windows looks for, which is why list disk looks weird. Do not run mbr2gpt or try to convert the disk.