The situation: I downloaded Windows 8 RTM from MSDN (I have a subscription). Naturally, I downloaded the product key as well.
Windows 8 installed like a dream: lightning fast with no problems. I accepted the product key at the beginning of the install.
Next, I thought I would download Updates, but they failed, so I checked the system's activation in Control Panel > System.
Problem: It returned "Product ID: Not available."
There's nothing under "Windows activation" that I can click on, no blue links.
I had a 'Chat' with MSDN, who introduced me to SLUI.exe. On Windows 8 it did nothing. (On Windows 7 it is supposed to bring up the Activation Menu).
I phoned the Microsoft Activation number, they told me to contact MSDN. MSDN left the 'chat' by telling me to contact Microsoft! Hmm... I wonder if anyone at SuperUser can help?