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I was trying to uninstall Linux from my dual boot system and ran into a problem. I deleted the Ubuntu partition and closed my laptop while I went and downloaded a win 10 creation tool to revert the boot loader. Unfortunately that turned off my PC so when i came back I am stuck in GRUB and don't know how to boot from USB. I tried "ls -lh" and noticed the only thing that is different when the usb is plugged in is there is a hd0 that says the file system cannot be accessed. I am assuming that is the usb with win 10 creation tool because it isn't there when the USB isn't plugged in. I set it as the root but when I tried chainloader +1 like has been suggested for this scenario is get invalid buffer alignment. Can anybody help me boot from USB?

Austin Capp
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  • Is the USB set as first HDD in BIOS? – C.S.Cameron Jun 06 '20 at 08:23
  • Have you got another computer that works, or can you borrow a computer? It is probably easiest to use a computer with a woriking operating system in order to download some iso file(s) and create a USB boot drive(s), that can install or repair the operating system(s), that you want in the problematic computer. – sudodus Jun 06 '20 at 08:30
  • Try preesing f12 before you get grub and booting from there. Do u have uefi or bios? – VidathD Jun 07 '20 at 09:00
  • @sudodus I have a USB with the win 10 install on it that can repair. The issues is getting the boot drive to work in GRUB because it won't let me access it. – Austin Capp Jun 24 '20 at 04:04
  • @SasukeUchiha GRUB boots instantly and won't let me access bios – Austin Capp Jun 24 '20 at 04:07
  • Do you have fast boot in your BIOS enabled? You should be able to boot into firmware settings before grub – VidathD Jun 24 '20 at 04:17
  • These links and links from them may help you boot into the Windows 10 installer drive: https://help.ubuntu.com/community/Installation/FromUSBStick; https://help.ubuntu.com/community/Installation/FromUSBStick/bootUSB; https://askubuntu.com/questions/1190764/why-doesnt-a-bootable-usb-boot/ – sudodus Jun 24 '20 at 08:08

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