There must be something wrong with your system. I ran the trainer here on Windows 7 x64 smoothly. Perhaps you should download and install the latest release of Windows 7 as I installed mine a couple of weeks ago.
on windows 7 my opinion is very good have reason to change to this i use to use windows xp (vista suck)most game work wonderfully if not better the color,effect & increase frame rate on window 7 see more after i update the directx (now it state that is DX11) minor bug is still because this is only RC when officially release will definitily get.if can get window 7 x64bit u notice alot improvement my spec
intel q9550 6gb ram (just upgrade because W7) ati 4870 crossfire