and download the firmware for your ipad model. if (like the rest of us) you do not know which ipad 2 you have, then download the first IOS 6.1 ipad2 file following these steps and if you receive a message saying "not for this model, or not compatible" then try the next file.
small warning, this is a total factory restore so the downloads are around 700mb each.
1. open itunes, ipad disconnected.
2. connect ipad
3. warning restore message appears
4. (windows users) HOLD SHIFT and click the restore button. This should open a dialogue box allowing you to navigate to the file you downloaded. Select the file and hit ok.
5. this should start the manual restore, if it fails, download the next file and repeat.
points for solution welcome.