Windows 8 upgrade offer: will I be able to format or forced to upgrade?

I'm considering buying Windows 8 Pro with Upgrade offer. I'm currently using Windows 7.

My question is very simple: Will the installation DVD to be downloaded be able to install Windows 8 from scratch or does it need Windows 7 to be installed?

I'm asking this because I will eventually format my computer and I prefer installing an OS from scratch rather from an existing installation.

Answer

You can still use the Clean Install trick from Windows 7 in Windows 8:

• Install Windows 8 with your key



• Open regedit.exe with Start Menu Search and navigate to:

  
  
  

  HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Setup/OOBE/




• change the value MediaBootInstall from "1" to "0"




• run slgmr.vbs -rearm and reboot


• activate Windows 8.