Hi everybody! It is my first post here so forgive any mistakes I make. I have a laptop Acer Aspire 4315 with 2 disks. One XP and one Windows 7 I had a problems with the key activating my windows 7 and for that reason I downloaded again Windows 7 Professional. I can do it for free as a student in a greek university. I want to install Windows 7 on laptop and have only them. I download them from the msdnaa website and when the download was completed there is the message that I attach. What shall I do? Thanks a lot! I know there shall be many people to solve my problem!!!