Comment Re:Single shop most likely (Score 4, Informative) 323
I don't know if the installer somehow determined a preset key based on a unique identifier associated with the computer itself
It did, for large volume OEM's Microsoft has them burn the key into the BIOS which is why most don't come with the hologram sticker anymore, there's no need for it on Vista+ systems. The only problem it can sometimes cause is if you're doing a cross version and cross type install without an existing OS on the box (ie it came with 7 home and you're doing an upgrade install of 8.1 Enterprise)