Hi iam (and I'm sure you're not) a very warm welcome to seven forums.
I have a Roccat Kone mouse and got it when they first came out. I think they are great in every way apart from the
drivers.
I'm at work now so I can't tell you which
driver I am using but I doubt it's the most recent.
I always had problems when re-installing the OS. I would download the Roccat driver, put it on a USB stick but it wouldn't install.
I found the only way to install it was a fresh download from the Roccat site.
But you are unable to download it at all?
Perhaps the Roccat site is having problems.
If I were you I'd google "cannot download Roccat Kone driver" and see what comes up.
I'm working all night tonight but when I get home tomorrow I will certainly send you the driver I am using.
As I say I don't know whether it's the latest but it's working perfectly in all 3 x64 OSs I'm using.
But, as I've also said, I never was able to install the driver from a USB or from my documents. It just seemed that it had to be straight from Roccat and installed straight away.
Very odd really.
I'll check this thread tomorrow to see if you've sorted it, if not I'll send you mine and you can try that.
Cheers, John