According to Microsoft, almost all* upgrades are like for like. So, if you started with a retail copy then you end up with the same rights as a retail copy. Pr

According to Microsoft, almost all* upgrades are like for like. So, if you started with a retail copy then you end up with the same rights as a retail copy. Presumably this is reflected in the kind of key that's generated, but at worst, it's a phone call.... * Where that's possible. Ultimate becomes Pro so you lose, or Starter becomes Home and you win.