Pause any game(s) that you have running in the various player slots. Exit the game. Go to the directory where Virtual Villagers is installed (the default is \Program Files\Virtual Villagers) and look for the files Isola*.ldw (where * is any number from 1 to 5). Those are the savegame files. You can copy them to some sort of external media for safekeeping until you have your computer back. That way, if something DOES go wrong while your computer is being repaired, you can restore your savegame files and continue from where you left off.