Every time I build a wonder in my civilization (CivIV) the computer extremely slows down. On some of them it just exits the game (exit to the desktop) while on others it manages to get through by becoming extremely slow. The option #2 gives me a chance to save the game before restarting it so it would come to a regular speed, while the first option doesn't allow me to do anything (it just exits to the Desktop). ANY IDEAS HOW TO FIX THIS??? 
