I just recently installed Windows 8 on my home computer. During the installation process, I was not asked to provide a product key. This led to me not being able to activate Windows after the installation process.
To resolve this, follow these steps:
cmdCommand Prompt and select Run as Administratorslmgr -upkWindows+C to bring up the Charms windowSettings and click Change PC SettingsActivate Windows tab will now ask you for your product keyOddly enough, I had trouble finding this info so I thought I’d share.