Cant download itunes

Hello,
I just got a new Hp G60 laptop and im trying to download itunes to it but every time it asks me to run the program the Error screen comes up saying: C:/Users/Big Terrio/AppData/Local/Microsoft/Windows/Temporary Internet/Files/Content.IE5/01153R2V/iTunesSetup[1]. exe is not a valid Win32 application. What does this mean and what can I do about it.