I am running Mountain Lion and Windows 7 on BootCamp. Learning Windows 8 upgrade only 39 dollars, I am definitely going to upgrade from Windows 7 to Windows 8. My question is that can it be upgraded directly via BootCamp? or Should I do fresh install for BootCamp? Since the price is for upgrade version, if I do fresh install on BootCamp, there is no way for Microsoft to know Windows 7 previously ran on my mac, so that probably cause the ineligibility of upgrade. Any ideas? Is there anyone upgraded from Vista to Windows 7 on BootCamp before?