I don't understand what is going on but I have updated my computer and have all of the latest software. When I go to play a game it will load up the main page of the game (not the website) but when I hit play or load game it refuses to play. I will either get a black screen or the page will stay stationary. Doesn't matter how many times I click play or load it's like I am clicking on a dead button.
Or, if it isn't the black screen issue described and linked to above, check if you're not blocking something. See here and onwards for some thoughts on those issues.