Exactly the same problem here. I am still using the Evaluation Copy. Version 6.2 build 8400.
Now in the position where the trial period has finished and I need to buy the proper version. The downloads have NEVER worked properly. I have followed pretty much all the guidance etc and I was hoping that Microsoft would have come up with a fix as I really like Windows 8. The only security I have on my machine now is the windows security.
I have tried downloads in Explorer, Chrome, Firefox and probably a couple more. Gonna try Torch so I will let you know. Some people do say that it is the website I am downloading from but I have tried from various now and IT STILL DOES NOT WORK!!!
I have now got to decide if I should buy or re-install Windows 7 with IE9 (Which is a real pain in itself to do this!!)
I may have noticed a theme going though but I am not sure. If you google the problem, a lot of people are saying "I have a HP envy" or "I have a HP pavilion" or "I have a HP Beats". Just wondering if it is a problem with HP.
It all worked fine when it was Windows 7 though. I have a HP!!!! and the HP restore manage is not compatible with Windows 8!!!!
C'mon Microsoft, give us a definitive fix.
P.S. I have an optional update for my Bluetooth adaptor but I don't think this is the problem