I've been using VMWare Fusion 5 to run Windows 7 to play some of the Total War games. It has been running them fine until recently. Suddenly, playing either Medieval or Rome was/is very slow. Basically unplayably laggy, even on horrible graphics settings, though everything else in Windows runs fine. This just happened one day and did not coincide with any other change. I was running Mavericks when this happened, but a downgrade to Mountain Lion (for other reasons) has not changed anything. I have an expanding virtual disk (100GB max) running on a disk other than my bootup disk, actually, a RAID 0 striped set of two drives. I made a new disk and reinstalled Windows on it just in case I had some viruses or something and made this one pre-allocated to 40GB, still slow. Any ideas? Here are my processor/RAM settings, and I've got this on an 8-core 2008 Mac Pro with 6GB of RAM. The VM is only using 2.2GB of RAM, and my system is fine on free RAM: P.S. Word of advice in Windows: Do NOT download anything from CNET when it's available elsewhere… unless you just love toolbars.