The Lubuntu desktop resembles something like XP with the start button at the bottom. Maybe you should just download the ISO image of Lubuntu and do a fresh install. Here is the link to their site
Lubuntu is a light weight Operating System designed for computers with limited graphical resources.
You can also consider Ubuntu Studio which uses the Xfce graphical interface, made also light weight for computer with little graphical resources here is the link to their site.
Look at screen shots of both and decide which one you like best.
I really dont know what else to suggest you on your current installation. However keep us posted on whatever you decide maybe somebody else here on the forums can recommend something else.