Well that was not anxious constantly, here are details about the possible upgrade paths Windows 8.
Users of Windows XP (SP3) can upgrade to Windows 8, but that's left is your personal files. That is, application or system settings you have in Windows XP will not be carried over to Windows 8.
The same is true for users of Vista without Service Pack. Fortunately, if you are a Vista SP1, since setting the system will take transported into Windows 8.
Windows 7 users have better luck. All personal data, system settings, and even applications that already exist will be included in Windows 8 when you do the upgrade. But this also depends on which version of Windows 7 that you have and the version of Windows 8 that you want.
If you want a basic version of Windows 8, you can upgrade from Windows 7 Starter, Home Basic, or Home Premium. For Windows 8 Pro, you can perform an upgrade from Windows 7 Starter, Home Basic, Home Premium, or Pro and Ultimate versions. If you want to upgrade to Windows 8 Enterprise, you can only do it from Windows 7 Pro or Ultimate.
O yes, the files and settings you have will not be present in Windows 8 if you are upgrading from 32-bit version to a 64-bit version