I got this error, it means that your iPad / iPhone isn’t playing well with your Windows PC.
Why it happens?
You, most probably, didn’t let it do its shit while it was syncing (Ah, Backing up takes forever!)
What you do now?
1) Connect your iPad / iPhone to your computer.
2) It’ll show up the error.
3) Now, switch off your iDevice without breaking connection means, don’t disconnect. (Hold the button on the top for about 5-6 seconds and then slide to power off)
4) Switch it on. Hold the button on the top.
5) Your computer will most probably detect your Device and sync.
6) If not, try reinstalling iTunes.
Got any other fix? Please comment..