Sims 3 Installation Error Message help?

if you only just bought it and its not working then theres possibly something wrong with the game. try and install it on your other computer and see if it works there. if not, i would suggest taking back to the store and asking them about it, they know what theyre doing. if it is the disc, they should give you a new one, considering you only bought it recently. this must be really frustrating, sorry i couldnt be more help, its hard to give advice on these things when you cant actually see whats going on. anyway good luck :)