Your iTunes ran fine a couple of days ago but not you suddenly get a No Disk Error message saying “There is no disk in the drive. Please insert a disk into drive\Device\Harddisk\DR2” when trying to launch it? Most of the time, it may give you the options of Cancel, Try Again, and Continue, but the error message may keep on popping up when you press each option or click the red x. What is wrong with the computer and how to fix it?
“iTunes was unable to load data class information from sync services”
“iTunes was unable to load provider data from sync services”
You may see one of the above error messages in iTunes when trying to connect to an iPhone, iPad, or iPod touch to your Windows computer or when trying to sync with your device. What exactly causes it and how to fix this iTunes error immediately?[……]
When trying to restore iphone 4s or ipod, some users will annoyingly get the iTunes error 21 message. I found a user tell me that, he had tried three computers to finish the restoration job, but get the same errors message at the end. What does this iTunes error message appears and how to troubleshoot & fix it immediately? I think this is a question that troubles lots of PC users right now. Don’t worry! Here you will get some advice on what you should do.