running win 7 64 bit and itunes continues to stop working even after uninstalling repeatedly

I have windows 7 64 bit on my PC. Itunes continuously stops responding and closes whenever I open itunes. Whether it is to play music, plug in my iphone or ipod shuffle. I have uninstalled itunes too many times to count and reinstalled it. Every suggestion I have found online I have tried and I AM ABSOLUTELY FED UP. This prob makes my use of iphone for music impossible and a real bummer. PLEASE HELP