Once in a while while syncing your IPhone or IPod touch with itunes you will receive an error, but there is a simple solution to this little problem.
This annoying problem has a surprisingly simple solution. If your iPhone or iPod touch develops a missing pairing record problem, you can fix things by closing out of itunes and restarting it. If the Problem still persist after restarting itunes you will need to restart you’r computer.
If restarting your computer didn’t fix the problem here is another fix that is slightly more complicated but still simple.
1) Unplug iPhone.
2) Exit iTunes.
3) Open the C:►ProgramData►Apple folder and delete the “Lockdown” folder. (Or temporarily move it to your desktop, if it makes you feel better.)
4) Restart iTunes. (It automatically creates a new “Lockdown” folder.)
5) Plug in iPhone.
6) Syncing begins automatically, and you’re done