After installing ubuntu 12.10 permanently from windows xp professional It is a compaq evo n610c, and entering password login, it just shows a blank desktop screen. no icons, no upper left menu. nothiing. what to do ??? I am new to ubuntu and linux operated systems....do i need to go to an older version of ubuntu for ubuntu to work ???

here are more specs: http://h18000.www1.hp.com/products/q...11382_div.HTML