The windows 7 Home premium 64-bit currently installed is upgraded from vista. The upgrade key and disk are available as well as in the HD. The current goal is to upgrade from an Q8300 to a i5-2500K, with the appropriate mobo (asus P8P67 M-Pro) and ram (8gb ddr3 g.skill 1333), what are the necessary steps/advice when doing so w/o purchasing a new OS?