I have a inspiron 620 which has a core-i3 3.3GHz quad core, GTX 550ti, 8GB 1333mhz, 7200rpm 500gb hd, windows 5 64-bit, and stock case and coolers. I downloaded Train Simulator 2015 and it wouldn't open. I tried to send Dovetail the temp dump file and they didn't help me. I have reinstalled it and made sure all cache files are there. This isn't the only game that I meet min. requirements and won't run. What is possibly going wrong?