Why is it that when I change my video card, Vista Premium requires another activation? It won’t allow me to reactivate again over the internet. I had to call in to reactivate.
What happens when I have to change the motherboard in the future?

I have an activation code to download Windows 7, but have lost or misplaced my disk. Does anyone know where I can go online and download the software without having to pay again?

My hard drive is really messed. So I need to reformat it (hopefully that works).

But after several moves, I can find the windows xp cd activation code. I can run windows only in safe mode. Is there anyway to find it in the registry?