I used to play on my XP machine super happy. Since I but a Windows 7 PC with 64 bits have, the game is over after 10 minutes. Either the image freezes and I have to restart the computer cold, or the PC is just completely and I NEN black screen. Guessed the Internet Tips to activate the game from the Windows firewall, or run the game in compatibility mode did not help. Now I have uninstalled it and hope to RCT 4 this winter, what's going on, hopefully on my computer.