ITunes 10.3.1 Freezes when I plug in iPhone, various other problems

Question

I've had loads of problems with iTunes, Windows 7, and my iPhone 4 which I got in february (along with the iPod Touchs I've owned in the past.)
Today, my problem is this. Every time I open itunes, it opens fine, and everything is okay. But when I plug in my iPhone 4, things stop working. One of the following things will happen:
A) iTunes will completely stop responding for 3+ minutes, until it finally gives up trying to find the iPhone. Even if my iPhone is still plugged in, iTunes wont recognize that it's plugged in and acts like nothing is plugged in. My iPhone does not sync, and it acts as if it's plugged into a wall charging port.
B) iTunes freezes for a second, then asks me to either restore a backup of my iPhone (deleting everything on my iPhone since all the backups seem to be from ages ago), or start as a new iPhone. I click start as a new iPhone, and it tries to make a backup, and for some reason it says that my iPhone 4 (32 gig capacity) only has 4 gigs TOTAL space on it, and then when the backup finally finishes, iTunes will freeze up and I have to close it down.
I've tried everything to fix these garbage issues that no one should be having (I've been having these issues since before 10.3), but nothing has worked. I've reinstalled iTunes, restarted my computer, restored the device to factory settings, updated the device via Device Manager, nothing works.
If anyone has a fix so that I can sync my iPhone at all (let alone in a fast manner, which I've NEVER been able to do), I'll be a little less inclined to ditch my iPhone ASAP.
Specs:
iPhone 4 32 gig
iTunes 10.3.1
Windows 7 Professional 64 Bit
Intel Core i7 CPU Processor 860 @ 2.8 GHz
NVIDIA GeForce 9800 GTX+ Graphics Card
4 gigs RAM
300 gig hard drive (108 gigs space left on it).

Answer 1

I have the same issue.  I took it the genius bar and called talked to tier 2 phone support. They have standard thing where you uninstall all apple software in a certain order and then reinstall 64bit itunes.  That did nothing (tried it 4 times).
I've gotten two clues so far.
One is that at the store if I plug someone else's iphone 4 in then itunes acts the same way. So it is not the phone. Two is tier 2 phone support told me to try syncing it with a fresh user account (an admin one). I did that and itunes was just fine, it did not freeze.
So there appears to be some conflict with the software, music files, whatever that is on my current user account (also an admin account).  I ran virus and malware detectors and found nothing.  Now I'm going to try putting my music, movies, apps, etc in the new user account and see if the phone will sync then.
I know its not much but thats where I'm at. I hope it helps.