How to Fix Windows 7 USB 3.0 Installation Issues Installing Windows 7 on modern hardware often hits a major snag: the mouse and keyboard stop working during setup. This happens because the original Windows 7 installation media lacks native drivers for USB 3.0 ports.
If your motherboard still has a PS/2 port (round, purple/green), plug in a legacy keyboard. PS/2 ports are not USB-dependent and will work instantly. Once Windows is installed, install USB 3.0 drivers from the motherboard disk. download windows 7 usb 3.0 creator utility 64-bit
This is tedious but effective.
This is the trickiest part. Microsoft does not offer this tool officially. Instead, motherboard manufacturers created their own branded versions. (an ASUS tool works on an MSI board). How to Fix Windows 7 USB 3