Problem with windows activation

>-----Original Message-----
>Last month I upgraded my computer's hardware and after
>everything was installed I started my computer. After
>Windows XP booted up and reached the desktop, I received
>a notice from an icon that I had 30 days to activate my
>operating system. I clicked on the button to activate it
>and I received the statement that Windows XP is already
>activated.
>
>My thirty days are up, and every time Windows told me to
>activate my operating system, it stated that it already
>was activated. Now it says that I must activate my
>operating system before I can access it. I click on
>activate, it states that it is already activated, it logs
>me off then says I need to activate it again. What is
>going on?
>
>
>.
>