well win 8 comes with more drivers for newer stuff than win 7 does...which is why win 7 sometimes asks for driver disks
get updated drives for win 7 for your pc, then when u have install problems again..and if it asks for drivers, use the ones u dl'd to the usb stick
note - extract them to the usb while keeping original zip files intact on whatever you dl'd them to. just in case your usb stick is flawed.