At the time of the error, I was running iTunes 10.4.1.10 on Windows 7 Home Premium, 64bit OS. I had just starting using iTunes again to sync with my iPhone 4. It had been nearly 2 years since I had used it with an iPhone -- the original.
Try these steps to correct the problem:
- Eject / disconnect your all iTunes devices (iPhones, iPods, etc)
- Close iTunes
- Open Task Manager and kill the Sycservices process
- Rename the "C:\Users\[your user name]\AppData\Roaming\Apple Computer\SyncServices" folder.
DO NOT delete the folder, because if this doesn't solve it or causes other problems you can always return to this older version of the folder.
- Restart iTunes
- Re-attach your device