Help with installing a pc game

[Guest]

hello,
A while agow i bought the pc game "Roller Coaster Tycoon 3"(RCT3). I installed it, played it and it worked fine. I then got another game and installed it, but before I did that I uninstalled RCT3 to save memory. I soon got fed up of the new game and uninstaled it. I wanted to play RCT3 again so I tryed to install it, but just a while after it starts instaling it stops and says there is an error.l
What can I do to install it ?

 

[isamuelson]

We need to know the specific error. Otherwise, we don't have much to go on.