I installed Win 8.1 Update 1 as a clean install from my bootable USB Thumb Drive. I entered the bogus serial to do the initial install. I then used several programs to retrieve the legal serial from the BIOS as this came with Win 8 as it is a Compaq Laptop with 8 preinstalled. It only shows the serial I installed with and not the real one I want as it is the legal one. Sure I activated it with KMS thing but if I have a legal serial then why not use it. I have done this previously with Win 8 and it gave you the real serial from BIOS. How do I get the legal serial from BIOS now with 8.1? Thanks.