PLEASE HELP!

[Herbacious]

I bought and downloaded the game through EA.com, not in a store. I am 100% sure my computer meets the game requirements.  Every time I try to play TS3, it crashes back to my desktop.  I know from reading other help threads that this has been a common problem, but all the solutions I tried do not seem to work.  The only thing I haven't tried that a lot of people said worked for them was uninstalling EA download manager; since I downloaded the game through the website, I can't uninstall EADM or it will delete my game.  Help please?  I don't know what else to do!