Playing solo missions - the game lags or just freezes, sometimes the cursor on the map page can move but cannot click on anything. And it remains as the red square reticule rather than a mouse pointer arrow...I am forced to reboot my pc as it hangs and never recovers. The problem has become more frequent as I progress through the missions. I get game saves but also am finding AI do not always comply with orders (although that could be by design) and so progress through missions is often accomplished purely as a solo player (Kerry).