I've never dealt with OEMM in any way, shape or form, so I wanted to ask. I have a Laptop I need to get Windows 8.1 Core (has Windows 8.0 Core legit OEMM) on, and Windows Update is acting funny even after a refresh (of course the store forces you to update before you get 8.1 there). If I put Windows 8.1 on a USB (now this Laptop is UEFI and causes my Easy2Boot to not work), and format and install 8.1 clean, will it pick up the OEM activation? I tried to load the ISO from within Windows and it said the key could not be verified. All this, and the fact MS new account took 10 tries to get to "verify account", has lead to MS making for a really stressful day.