I have been using BootCamp for a solid year without a single problem. I installed VMWare Fusion today, and my BootCamp partition is now completely useless. Windows dies immediately on startup and says that it can no longer be used with my hardware. This happens in VMWare Fusion, and it happens in a direct BootCamp startup. In desperation, after a few hours I even tried to rescue it all with Parallels. Same problem. Nothing works anymore and the Help offers no troubleshooting tips of any use. So now, I have to reinstall Windows, redownload everything, redo all of my settings, reimport my files and bookmarks. Yes, time to rebuild everything I had done to Windows over an entire year's time. So, thanks VMWare for time and money I will waste trying to get back what I already had.