Don't get any errors of some sort that might explain why it's doing this?
I spose one thing you can try is that you right click the FH icon. Choose properties.Find the compatibility tab.
Try to run the game in windows xp, service pack 2, run it as administrator and disable visual themes. Not because this should fix it, but it's always worth a try.
I'm no fully sure how you're meant to fix this problem actually.
When you reinstalled the game, you also removed the game completely from the control panel first right? and you also redownloaded "New" installers and installed the game with those?
I'm not sure if this would help, but have you updated your graphic card drivers lately? wouldn't hurt trying.