Game Crashes and flashing screens

[dita]

Playing WinSPMBT (the cd version) since it arrived. No crashes until today. Playing a email game, ended my turn and whilst watching the opponents artillery land (not fast artillery) get a windows error message "WinVFX8.dll" performed an illegal operaion! Send/not send to microsoft?

Unfortunately, I have no other info, I could attach my turn file to this post (Obviously, I`ll need to post the password for the file as well) I`ll happily do this is it helps.