iTunes Error 5002
Support For iTunes 5002 Errors
If you've found this iTunes error website you've probably experienced the iTunes 5002 error when purchasing music or obtaining a podcast. Some have reported that a solution to the iTunes error 5002 is to turn off the shopping cart feature and order using one click ordering. But what if you want to use the shopping cart in iTunes so this really isn't a good solution to the 5002 error.
Others have reported that a fix for the iTunes error 5002 is to change your username on your computer and some have even suggested changing the computer name though I don't think this will be necessary. Changing the name of the user who logs onto system has been reported to work on both the PC and Mac platform.
Others have linked the iTunes error 5002 to a bad application in your app library. If you have downloaded applications in iTunes look through them for an icon that looks odd or generic. Delete the offending app and it may fix this 5002 error.
I found a great blog post with additional suggestions for fixing the error 5002 in iTunes.