Just want to cheer som info.. Went to shop an bought a brand new acer aspire E1, included preinstall of W8. I desided to make a clean install, took my orginal W8 pro 64 bit dvd (downloaded from MSDN), formated te disk and started to install new CLEAN windows. I am owner of a MAK key with many activations so i was planing to use this key on my new install. But, under install, i was never asked to type any key.. And after install was complete, the OS was OEM activated.. And, it wasnt W8 pro, like the install dvd i put in the dvd rom. It was the core version that followed the pc from the store. But it was a clean install offcourse. It seems no need to type any key, on clean installs on computers delivered with W8 OEM-SLP licenses.