Is this the nearly 900mb Single Download Update the Idiots at MS released the other day?
Considering the appearance that this is more like a New OS Install than a simple Security Update, not to mention the fact that you have to re-register with MS that you have a Certified Copy and you are Not Just Another Software Thief...
At a guess... although I am not a 'doze expert, it might indeed be the case. *grin*
But I am not an expert, after all. *smile*