New to this forum and fairly inexperienced in computers, I am wondering if there is a way to do a clean install of Windows 7 Professional on a Dell XPS 15 with OEM Windows 7 Home Premium Pre-installed. I have a new legit copy of Win 7 Pro. I don't use pirated software (at least knowingly). All I've read so far suggests it is not possible or at least not easily done. I need to know if it is possible and if someone has succeeded in doing it, what problems might arise.