I'm experiencing the same problem.
itunes 12.1.3
Vista 32 bit
iPhone 6
iOS 9.1
i expericed it with iOS 9.0 and 9.0.1 as well.
Steps taken:
1. Thoroughly uninstalled iTunes, (which included all Apple software, and all hidden Apple folders found in AppData) and reinstalled as an administer. Rebooted computer. Didn't fix it. Tried this 2 more times.
2. Connected my phone to a friend's identical Vista 32 bit computer. The problem still existed.
3. Erased all content and settings on my phone and restored from iCloud backup. The problem went away (temporarily). I was able to click on the iPhone icon in iTunes, view the content of my phone, and even sync it one or two times. Never during, but at the end of the first or second time syncing, iTunes would freeze. After force-quitting iTunes and relaunching, I am back to the drawing board...unable to click on the iPhone icon without freezing iTunes.
4. Erased all content and settings on my phone and restored as a new phone. Again, The problem went away (temporarily). I was able to click on the iPhone icon in iTunes, view the content of my phone, and even sync it one or two times. Never during, but at the end of the first or second time syncing, iTunes would freeze. After force-quitting iTunes and relaunching, I am back to the drawing board...unable to click on the iPhone icon without freezing iTunes.
5. Held down the home button on my iPhone before connecting it to my computer, and continued to hold it until the "restore procedure" popped up in iTunes. Restored as new. Again, The problem went away (temporarily). I was able to click on the iPhone icon in iTunes, view the content of my phone, and even sync it one or two times. Never during, but at the end of the first or second time syncing, iTunes would freeze. After force-quitting iTunes and relaunching, I am back to the drawing board...unable to click on the iPhone icon without freezing iTunes.
6. Genius Bar appointment ended with them giving me a new iPhone 6. Again, The problem went away (temporarily). I was able to click on the iPhone icon in iTunes, view the content of my phone, and even sync it one or two times. Never during, but at the end of the first or second time syncing, iTunes would freeze. After force-quitting iTunes and relaunching, I am back to the drawing board...unable to click on the iPhone icon without freezing iTunes.
...