I am also having this problem, nobody else seems to have found a solution from what I can find, any help would be great (Graphics card is not the problem, I have had C4D working since I installed it and all of my other hardware).
I am not the best with understanding 3D modeling software yet, I mean I can model good enough for putting in games but since practically every tutorial never has the same interface for C4D as I do it makes it a little bit difficult to find certain things and I presumed I did something stupid to cause this problem to happen. I am using R13 and the latest updates are installed for it, I have tried totally removing any trace of the program and installing again but nothing has changed so I have to assume something external is causing the problem but I cannot think of any changes I have made to my computer hardware or software other than new games and updates to older programs.