Okay, after trying Civ V and hating it, I decided to get back into Civ IV after a hiatus of several years. When Alt-Tab switching, the game freezes (sometimes freezes, then crashes to desktop) and the only thing I can now do when it freezes is to do a Ctrl-Alt-Delete to access the Task Manager and force quit Civ IV. Any suggestions on how to fix this? (BTW, don't suggest windowed-mode. The font becomes distorted and scrolling does not work properly) For those that feel the need for specs: Civ IV Complete - all patches installed. This is a brand-new PC (not a laptop) far exceeding the minimum specs of this older game. Until this is solved, I guess I'll shelve this game once again. I'll go back to playing Stronghold 3 - which doesn't alt-tab freeze or crash ;-) Thanks in advance.