Can't sync iPad 2 or iPhone 4 since updating iTunes on Windows 7.

Question

Since upgrading my iPad 2 and my iPhone 4 to iOS 4.3.4 I havebeen unable to properly sync both devices with iTunes 10.4.0.80. I am using Windows 7 Ultimate SP1 64-bit. The issue is when it goes to sync my contacts and calendar with Outlook 2010, it will just sit there for > 30 mins doing nothing but “syncing contacts”, not going beyond that point. I have to cancel sync to get out of it. Steps I have taken include unticking sync contacts, calendar, bookmarks and notes, (this allows apps and photos to sync without issue) , removing the Apple USB device in Device Manager, and finally reinstalling iTunes.
I’ve never had sync issues with previous iOS and iTunesversions on this PC.
I’m out of ideas, any help out there, please?

Answer 1

None of the solutions in this thread or other similar threads have worked for me. I have uninstalled and reinstalled all Apple files using the correct sequence. I have disabled all Outlook plugins except for the two Apple plugins. I have disabled Bonjour and run Itunes in Windows 7 Compatibility mode.
I also seem to have a slightly different issue and I think the issue may be with the Outlook Itunes plugin or the Outlook Change Notifier plugin.
Here's my situation since upgrading to iTunes 10.4.0.80 and iOS 4.3.5 - although the issues started with earlier versions of 10.4 and 4.3. I am using Outlook 2010 32 bit version on Windows 7 64 bit version. I am using Outlook with a PST file not MS Exchange.
1. The sync appears to go okay with the backup, preparing to sync, syncing contacts, syncing calender, syncing notes, etc. Successful backups are shown in the Device tabs in Preferences and if I run iTunes diagnostics all tests are successful.
2. Any edits I make in Contacts or Calender on my iPhone are not apparent in Outlook after a sync. The Notes seem to sync just fine.
3. Edits I make to Contacts or Calender in MS Outlook are inconsistently synced to my iPhone. Sometimes they sync and sometimes they don't.
4. No for the really wierd part. If I connect my iPad and sync all of the edits that were originally done on the iPhone are present and correct on the iPad. However, again edits that were originally done in Outlook are sporadic.
So it appears to me that the data in the Outlook file is probably syncing correctly but that the display of the data within outlook is not correct. This makes me think the Outlook Change Notifier might be the issue. I just don't know how to test this or fix this. I know there is a cache used with MS Exchange but I cannot find any cache with a PST file.
Any help or other ideas would be appreciated.
Rick Kienle