If you’re having difficulty syncing your contacts or calendars to iPhone or iPod touch with iTunes for Windows via USB, this article can help. Note that this article does not apply to wireless syncing with Exchange ActiveSync or MobileMe.

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1. iPhone, iPad, iPod touch: Troubleshooting contact and calendar syncing via USB on Windows
2. Advanced troubleshooting for Sync Services on Windows with Microsoft Outlook 2003 or 2007
3. iPhone, iPad, iPod touch: Troubleshooting USB connection
4. iPhone and iPod touch: How to transfer or sync content to your computer
5. Overview of syncing iPhone or iPod touch with your computer