A while ago I installed android shell alongside windows 10, but when I didn't need it anymore and tried uninstalling it, but I
didn't uninstall it correctly, and I left a broken grub behind and gave me an error 15 on the next boot, so I used a ubuntu installation usb and ran the command dd if=/dev/zero of=/dev/sda1 bs=446 count=1 in the ubuntu terminal, but when I booted next it showed an error 17, when I tried to use a windows installation usb and and made it only boot from USB, the grub gave this error:error: file '/boot/grub/i386-pc/normal.mod' not found..
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1. You may have just deleted the Windows system partition. 2. If you were actually booting from the Windows installation media no Grub related errors would be shown, ever! The problem is you AREN'T booting from the USB for whatever reason (maybe you should ask about that?). And in any case, in proper UEFI mode, all it takes after removing one OS is to open UEFI settings > Boot menu and change the boot order / OS selection to the other, in this case, "Windows bootloader manager".– ChanganAutoCommented Nov 27, 2023 at 18:07
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Why would it be booting from something other than the windows usb if I had all other options disabled in bios? Maybe I have a faulty USB stick? I should also clarify I'm using legacy boot mode.– JimmyCommented Nov 27, 2023 at 18:19
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Maybe because it isnt bootable? This is the #1 mistake... How exactly have you made it? If you're using Legacy in a UEFI machine, any from ~2012 or newer then there's exactly where you're `problems start. Right now you indeed need to boot Windows Installation media and follow instructions to repair the bootloader.– ChanganAutoCommented Nov 27, 2023 at 18:22
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I used the windows 10 media creation tool to create an iso file on another computer and put the iso onto a USB, but now that I think about it, I might have been supposed to use rufus– JimmyCommented Nov 27, 2023 at 18:24
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1Does this answer your question? Computer won't boot. UEFI DUET– music2myearCommented Nov 28, 2023 at 0:27
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