Thankyou to everyone that I asked for help but I finally worked out how to Install sims 2 on vista and for everyone else that is having trouble this is how i did it: Before Installing sims 2 try this > click Start > All Programs > Accessories > Run > type in MSCONFIG > Tools (tab) > select Disable UAP > launch > restart Windows > While this is disabled renstall sims 2 > Download update and Install > Then Enable your UAP again > It should work fine then GOOD LUCK