How to fix "doesn't look like an EFI partition" with WinUSB?
18,635
Solution 1
If what you want is to create a bootable usb to install Windows 8, you must use the dd command in Ubuntu:
Open a terminal.
Run it:
dd if=/path/to/file.iso of=/dev/sdb
Note: Carefully check that the usb-stick is /dev/sdb
Solution 2
That really depends on what type of bootable USB you want to make. If you want to make a classic MBR, BIOS bootable Windows USB try this solution.
If you want to make a USB to install Windows in UEFI mode, things are different:
- Apply a GPT partition table to the USB drive and format it as FAT32 using GParted
- Copy Windows files from DVD/ISO to USB using the file manager
- Look for a
bootx64.efi
file inefi/boot
folder in USB drive. If it doesn't exist extract it from the Windows ISO,sources/install.wim
file by opening it with 7z unarchiver. You can find abootmgfw.efi
file in./1/Windows/Boot/EFI
. Extract it, rename it tobootx64.efi
and place it on USB inefi/boot
folder.
Now the USB drive is UEFI bootable (but not BIOS) and can be used to install Windows in EFI mode. The complete guide is available on my website both for BIOS and UEFI.
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Author by
white deer
Updated on September 18, 2022Comments
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white deer over 1 year
Using WinUSB I get this error. I would appreciate any help as I'm trying to put Windows back on computer to please th' wifey, then dual boot so i can still use Ubuntu.
Installation failed ! Exit code: 512 Log: Formating device... Mounting... mount: block device /home/lighthouse/Downloads/Windows 8.1 Update 1 Pro X64 PreActivated/Windows 8.1 Update 1 Pro X64 PreActivated.iso is write-protected, mounting read-only Copying... Installing grub... Installing for x86_64-efi platform. grub-install: error: /media/winusb_target_1412439366_7311 doesn't look like an EFI partition. . Error occured ! Syncing... /usr/bin/winusb: line 78: 15592 Terminated while true; do sleep 0.05; echo 'pulse'; done Cleaning... /usr/bin/winusb: line 78: 15971 Terminated while true; do sleep 0.05; echo 'pulse'; done Umounting and removing '/media/winusb_iso_1412439366_7311'... Umounting and removing '/media/winusb_target_1412439366_7311'...
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white deer over 9 yearsoutput for this command is dd: failed to open ‘/path/to/file.iso’: No such file or directory
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web.learner over 9 yearsYou're supposed to replace the path with the path to your ISO and /dev/sdb with the location of your USB drive.