This is the code for a blocked product key. I see no obvious reason in your MGA report.
One of the common reasons is abuse (installed on too many computers.)
A little history would help.
Where and when did you get your windows?
Have you installed it on more than 1 computer or shared it with anyone?
You could post your MGA diagnostic report on the WGA forums where the forum owner has the tools to check your product key and may be able to find out why it is blocked. He works Redmond hours so likely will no see it until tuesday.