I just bought a Toshiba Windows 7 Laptop on Craigslist minus the hard drive and thus minus windows 7. It came with Windows 7 x64 Home Premium. I have the COA sticker. I'm going to buy a new hard drive and I would like to get Windows 7 back on it. Best way to make this a legit Windows 7? I'm thinking download a copy, add the OEM folder to the iso & then install. Will this be all I have to do? Thanks.