How to make Windows 10 ISO bootable USB
Since the availability of USB drives, the use of CD and DVD had significantly declined. The reasons behind this are portability, easy to use and the most important fast copying of data files by the USB compared to the old methods. Since USB flash drives have high data transfer speed, the installation time is significantly reduced when Windows 10 is installed from bootable USB flash drive.
After the release of Windows 10, most of the windows users may have reserved a copy of the free windows 10 upgrade. However, you may want clean install windows 10 from USB using a Windows 10 ISO to avoid windows from slowing down.