I had a similar issue with Amazon download. I'm running Win 7 x64. The download was successful, but everytime I hit install, nothing happened. Rebooted, still nothing. So I ended CCC.exe via task manager while the Amazon Install prompt was displayed ( All other apps were closed). This corrected this issue. Hopefully this will help if anyone else decides to buy Red Alert 3. I started with Dune II by Westwood and love the series.