Basically, I installed this SSD and tried to migrate it using the Samsung software but it wouldn't let me because my 1TB hard drive has 600 GB used. I want the new SSD to be wiped clean with windows 7 but don't know how to go about it. I tried to install the windows 7 discs but when I put my windows 7 key into the download manager it just said: "The product key you entered appears to be for software pre-installed by the device manufacturer". Really what I'm asking is what should I do if I want a wiped clean SSD with just windows 7 and if I can use two different CD keys on one motherboard. I want to buy a windows 7 key online then download the disc portion on Microsoft's website using the new key I bought online if possible