You are working as a desktop support technician at a computer store, and a customer approaches you with a laptop computer he purchased three years ago. The computer came with Windows XP Home Basic installed on it, and the customer now wants to upgrade to Windows 7 and also use the computer to log on to the Active Directory Domain Services domain at his office. He knows he cannot do this with the Windows 7 Home Premium edition, so he wants you to upgrade the computer to Windows 7 Professional, without affecting his files and settings. Explain in detail the procedure you would have to use to fulfill the customer's request.