EDIT: I was slightly mistaken in my original post.
I have a copy of that registry key if you want me to send it to you? If not, I can ask my brother how to create one and walk you through it.
Basically, something deleted the registry key that came with your original install. Likely a registry fix you ran at some point thought it wasn't useful. My copy of CCleaner has done that. You can recreate it, or if you want to PM me your e-mail, I have a copy of it.