Due to Windows 7 does not have proper USB driver for N3150 (Braswell) chipset, it will unable to use USB memory drive (USB storage) to install Windows 7 OS.
It will require SATA DVD ROM to complete install Windows 7 OS.
After USB 3.0 driver installation, all USB device will work properly.
Note: USB keyboard and mouse will work properly during Windows 7 installation.
