Needless to say, you need to set the USB bootable drive you created as the first boot device before booting from it. After you create a Windows portable USB, you need to set the system partition as active in Disk Management or third-party free partition software. As you know, Windows 7 does not have built-in support for USB 3.0, so you can only boot Windows 7 from a USB 2.0 drive.ģ. Otherwise, you may get the error 'Copy file failed. If you want to create Windows bootable USB from an ISO/WIM/ESD/SWM/VHD/VHDX file, make sure the image file is valid. If you cannot make the WinToUSB work, you can check a few things below:ġ. However, there are times when WinToUSB fails to work. You can create a removable Windows workplace on a USB device from an ISO image file, CD/DVD drive, or your current Windows OS. Unlike the feature of Windows 8/8.1/10 Enterprise, Windows To Go, it does not require Microsoft certified USB drives and it supports all versions of Windows 11/10/8/7. WinToUSB is a free tool that allows you to install and run your own Windows 11/10/8.1/8/7 OS on an external hard drive or USB drive.

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