Hi, I've seen a few of these forums already but none of these really resolved my issue. I'm refurbishing a 2007 prebuilt to sell for a new pc build, but have had trouble reinstalling Windows after wiping the drive. The problem is that I can't find an ISO image to download and put onto a flash drive for the install. I tried it on the Microsoft software recovery site and it asked me for a valid product key. I put in the one on the case and was greeted by a message saying that this code was from a prebuilt computer and that I should contact the manufacturer of my pc. I highly doubt that HP cares all that much about my old Pavilion Magnesium Gray Edition. Anybody have any ideas?