Sims 3 won't start up! So, i installed the sims 3 on my pc.. All went well and such.. i click the launch shortcut on the desktop, the window opens just fine, but then i click the arrow button to play, it begins starting and it gives me a black window like when it's about to start up but then it closes and nothing happens!!! No error or anything.. it looks like if i had closed it. I have all system requirements. My sister installed it just fine on her pc and it works.. the only difference between our pcs is that hers has a little more space and it doesn't have the sims 2 installed while mine still does. Could this be it? Both are windows xp, btw.