I've had a problem with my Civ 5 game for awhile now. When I first purchased the game, it worked fine but I had stopped playing the game for a little while and when I tried to play again, I got an error message on Steam saying the game was not installed. I didn't have the time nor the patience to deal with it, so I let it sit for several months until this past weekend when I felt like playing again. I installed the game from scratch and tried to load it up, however I get a windowed screen pop up and it's all black, then the game crashes and I get an runtime error message. I've looked around various support forums and tried the suggestions I found there such as disabling the intro video, reinstalling the DirectX files, reinstalling vcredist_x86, running windowed vs. full screen and nothing has worked so far.
No idea what else to do.