Hi. I have an Acer nettop which originally came with Win 7 64 bit and I then upgraded to Windows 8. I would like to sell it but obviously need to remove all my personal data first. My question is what's is the best way to do this? I have no CD so I would have to restore PC via recovery partition. If I do that will my data be safely destroyed? And once restored to Win 7 factory settings, will I be able to re-use my upgrade to Win 8? Any advice would be much appreciated. Thanks.