Sorry but what are you saying here?

I use an old computer with 8.4 on it linked by KVM changer to my self
built AMD with XP and 8.4 installed by Wubi and my laptop with Vista and
8.4 also installed that way and linked by wireless..

It gives me Ubuntu whatever I use and as I teach I need the lot.

Its clear to me that Ubuntu have made a real advance with Wubi.