Every laptop comes with two legal keys. One is the OEM key and the other key is pasted under the laptop as an sticker, on the Microsoft Windows sticker. Any laptop that is legally purchased, and which comes with Windows operating system, the owner of the laptop purchases the Windows too. Thus, the two legal keys. Sometimes, the laptop is sold without Windows CD, other times the Windows CD comes with bloatware and drivers. And, other times the Windows CD comes by itself along with a second CD, which contians the bloatware and drivers. Thus, anyone who wants to do clean install, either on the same hard drive, or a changed hard drive such as SSD, then one can legally download Windows from Microsoft site and use the legal key provided under the laptop on the Microsoft sticker. The drivers should be available free of charge from the manufacturer of the laptop, from their support site. Of course, if the original laptop came with the original Windows 7 Home Premium Edition x64, so the legal key works only for that Windows and nothing else. Best regards, KOR! P.S. Especially, on a SSD, it is much better to do clean install, then trying to move (clone) and align.