Product not compatible...But I have windows Vista?

I have 3 laptops 2 have been installed with Norton 2012, My son laptop is identical to Daughters, windows vista Home Premium Intel (R) Core (TM)2 Duo CPU ............... ETC.......

 

when i try to instal Norton 2012 on to sons lap top i Get

A problem has occurred that needs your attention

This product is not compatible with this computer operating system, you must have one of the following

and it lists what the lap top HAS  but wont load the Norton

 

any one got any Idea as i am Stuck as what I can do to Install

Thank you in advance