I had assembled a new pc. I had installed Windows XP on it. Later on when the setup was done I was going to activate Windows. When I try to connect the same through Internet Explorer I am getting a error saying that The requested lookup key was not found in any active activation context. I am getting the same error on all microsoft services. It is a new pc and this kind of issue must not arrive. I had then used windows update and installed all the fresh updates. But still the problem is same.