Create A Dual Boot Mode USB (Legacy And UEFI) For Windows 7/8.1/10 (UEFI Ready ISO)

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This is the only tutorial from BigReds that works, boots and installs any WIN 7, 8.1, 10 or AIO (All in one) OS.iso with UEFI support in Legacy and UEFI mode on one USB (NTFS – Active/FAT32 – Hiden partition) if your Motherboard has UEFI/EFI BIOS support. In NTFS format one file is allowed to be bigger than 4 GB and this tutorial is superb if install.wim is bigger, where FAT32 limit is 4 GB max.

Note that the OS.iso will also need to support UEFI otherwise this won’t work!

Also, if you…

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