With a few games, e.g. GSC2013 and Race07, I have a strange and annoying issue. When I make adjustments, for instance by clicking on + or - for fuel or steering lock, I sometimes get a CTD and have to start the game all over again. I cannot find out what the cause of this is. Because it happens with more than 1 game, I assume that it is not the game itself. Has anyone an idea what I can do to solve it ? Thanks in advance. FWIW: I have Windows 8.1 Professional 64bit.