在以下哪种情况下,你必须执行迁移,而不能升级安装?()
- AWindows XP Professional(x64) to Windows 7 Professional(x64)
- BWindows Vista Business(x86) to Windows 7 Professional(x64)
- CWindows Vista Enterprise(x64) to Windows 7 Enterprise(x64)
- DWindows Vista HomePremium(x64) to Windows 7 Home Premium(x86)