Possible Duplicate:
If I’m performing a an upgrade to Windows 8, do I have to have the previous version installed, or is just having the key enough?
How hard is it to upgrade my Boot Camp Windows 7 to Windows 8?
MS is offering heavily discounted W8 upgrade by download currently. I want to run a single Windows installation on my Mac using either BootCamp or virtualization (probably Parallels). I currently don't have an earlier Windows BootCamp/VM installed, but I do have a license to do so.
My question is: can I buy and download the W8 upgrade file on another PC and use it to get Windows 8 on the Mac at a later date?
As a side question: would I have to install W7 on the Mac and upgrade it?