Windows vista home premium upgrade Installation

Question

I purchased an online upgrade through best buy for vista home premium. My PC lost a hard drive and i could only re install vista basic. I have a copy of the XrML digiyal Licensing Package, but it doesn't work. Apparently when I made the copy, the boot sect was on a different harddrive. I recieve a message can't find bootsect.bak. My download is no longer in my digital locker either. Is there a way to resolve this issue or get a copy of my digital download? Purchase was made in april of 07 from Microsoft through Best Buy.