So far what ive understood, theres no more Cert/XRM-MS files that you can install that would link up with the a SLIC table in the bios. Theres no more COA keys on machines. Theres just one key, integrated into the bios that the windows 8 install checks for and uses. My question is, if i wanted to use that OEM key from one machine, on my own barebone built machine, is that possible anymore? So far from what i understand, the only way to do that is to use a Default windows 8/8.1 install key. And then Activate windows from the PC Settings using that OEM key from the bios?