Are you sure it's not Cyber Defender you're talking about?
That's the company that's notoriously bad about wiping out errors that aren't errors - to the point of destroying your operating system.
There's a class action suit against them.
I can't find anything about an anti-vi called "Cyber Defence."
I hope you can get everything restored. I went through this whole thing with Cyber Defender a couple of years ago so I know what kind of havoc it can wreak. :(