If I buy cheap upgrade version of Windows 8 Pro I can install it on older Windows 7 Home Premium, right? I've seen Upgrade Assistant from Microsoft support page but still have some questions.
What if I want to install that Windows 8 Upgrade version on clean disk? Do I need to first install older system just to update it to newer? Or this upgrade option means I can get new system cheaper becaouse I own older?
Is there a difference if my previous sytem was BOX or OEM?
PS Why Windows 8.1 is more expensive than Windows 8? Is it a selling trick?