Minimize CPU Usage by closing programs that your not using whilst playing USF.
Clean your computer registry , defrag , ccleaner virus scans ect.
Try running SF in Windows classic theme " i use this to get more fps on windows 7 " just an idea.
If that doesn't help i would only wait for anothers reply as i don't have this problem.
I did until the most recent patch.
It would take me like 45 secs to load a game now it loads literally instantly for me.