Gurus, 1) I gave (have) Win 8.0 VL installed on a notebook, can I upgrade to win 8.1 VL using the above said ISO. You know fresh installation is headache. 2) If fresh installation unavoidable, can I activate the new copy with the Win 8.0 activation backup ? 3) What is this meant - EULAID: WinBlue_R8_1_ED_PS_V_en-us? Many thanks.