IPad 2 Restore Error (-1) with iOS 5.1.1

Hello there everyone
My iPad last night seemed to get itself into a restart loop so I plugged it into iTunes to do a restore. The restore goes ahead and it verifies, extracts and does all the usual steps up until it says "Restoring iPad Firmware". Here it seems to get stuck for a few minutes until it throws an error: "The iPad "iPad" could not be restored. An unknown error has occured (-1)." I have tried pretty much everything in terms of resolving a restore issue such as switching USB ports, restarting iTunes, restarting the computer, changing USB cables, activating "DFU" mode and so on. Nothing. I have looked after this iPad very well, it was a gift, its been in a case its whole life, I travel around with it in a sleeve and I haven't dropped it or done anything that could of caused an issue.
It is still under warranty, this is a replacement unit I got when my first iPad kept throwing up an error 9. I will obviously take it in if there is an issue, however, I can only get to the nearest Apple store in a few weeks.
Much appreciated to anyone taking the time to read this and possibly help me find a solution.
Cheers
Chris

No, I have never jailbroken it, I did read something mentioning that being related to the issue, however, because I have never jailbroken it, it probably isn't related to me.

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