It should take 5 to 10 minute to complete the process, mostly depending upon the write speed of your USB flash drive. The two drawback of this method is, there's no legacy BIOS boot support and it's pretty impractical to format USB flash drives to FAT32, specially if it's 16 GB or more. Also thankfully the install.wim file is still under 4 GB, so it can fit inside a FAT32 partition. And all the UEFI boot related files are present inside the Windows 10 ISO file. Why?Īs the USB drive is formatted to FAT32, it also acts as the EFI System Partition, so it can boot in UEFI mode. Though not necessary, I've added the extra Eject step to ensure all the data is properly copied to the USB drive.Īctually this method works perfectly, without help of any third party software. If not, you've to use some other software like WinCDEMu or 7zip. Note: The direct mount feature is available only if you're using Windows 8 and above. When copying is finished, Eject the pendrive from system tray, and you're ready to go.Copy all the contents from the mounted ISO file to the USB drive.Format the USB drive to FAT32 filesystem.Plug in a USB drive to your PC, capacity of 8 GB or more.First mount the Windows 10 ISO file by right clicking over it.It's the easiest option if you want to boot windows 10 in only UEFI mode. Create Windows 10 bootable USB with Universal USB Installer.