I can't install norton internet security 2012 on my desktop!please help!!

i had kaspersppy pure before i bought this and i have 2 pcs i have a deesktop windows vista and a laptop windoows 7 i have uninstalled kaspersky on both of them and nis 2012 installed really quick and fast on my laptop and now when i put the cd in my desktop there is no autorun message like there was in my lapto it does not ask me to install so i went to computer and it said unspecified(1) it does not recognise it please help me i want to install it i have norton internet security 2012 1 year licence for 3 pcs.  on my system properties it says windows vista home premium service pack 1, if that helps. please help me i really want to install it

 

thanks