The Premium Idol Part1 How Do I Upgrade My Vista Home Premium To Windows 7?

How do I upgrade my Vista Home Premium to Windows 7? - the premium idol part1

I recently acquired a copy of Windows 7 Professional and I want to upgrade my operating system. However, during installation a message appears as I can tell you that are using Windows Vista Home Premium, I do the update at the end w / o deleting all files and programs. Is it possible to install without my files and programs?