CAN be helped. It happens on all old games on Windows 7. To fix it you must: 
1.run game and minimalize it (alt + tab) 
2.KILL PROCESS: explorer.exe 
3. alt + tab for maximalize 
It ALWAYS help (I playing on Windows 7 too). When u finish playing run explorer.exe proccess again. 
  
Sorry for my bad english but I think you understand it ^^