After an absence of several months, I've tried playing rF2 and it won't launch. The version I have is the Steam version. I can't think of any updates, other than GPU drivers, that I've made recently. When I last played it, it worked fine with Windows 10. I uninstalled it and also verified the integrity of the game files and it appears to be o.k. When I try to launch the game, the screen just stays dark and nothing happens. When I press the Windows key or hit "alt, ctrl, del", I get an error message that says "error creating vertex shader." Any help would be greatly appreciated. Thank you.