WInPC defender Registration Key

Hello,

I am having dell laptop with pre-installed windows vista and winpc defender bought in dec08. Til may 29th the machine was working good but since after that whenever start the system i get some alert msg from winpc defender saying "some remote ip x.x.x.x is trying to access your private data." with "allow" and "block" buttons enabled. if you click on block the msg box asking activate winpc defender pops up. if you click on activate it asks for the personal mail id and registration key.
i dont have that.
Can any one know why this issue is coming?
And what should be the registration key for it?