Rollercoaster Tycoon 3 problem

[Nelsoncal]

I have installed this game and played it before on my pc but about month ago i uninstalled it i can't remeber why but now when i try to install it again the autoplay screens comes up i click install and then nothing happens and it stops responding and then it says cannot find file needed or something like that can anyone help me please

 

[Mainframeguy]

anything under add/remove programs showing? Do a search on rollercoaster files or whatever it may have been called and remove them - then similar for registry (after taking backup!) then retry and let us know how it goes....