Ah, okay. Sorry for the question, but we have lots of not tech save people here, so it's one of the standard questions if you don't know to whom you're talking to. Because there's no need in examining the problem, if the card is not capable of DX11, and not everyone knows about the distribution of DX abilities over the OS + graphic cards.
And again: Only grayed out, or are the fonts also strange? If yes, then please take a look
here.