I would give it a hard reset and do not rehotsync it and see if it still acts up and if it does it is most likely defective. To perform a hard reset hold down the power button and while it is being held poke the reset hold with the top of the stylus cap that screws off. Once the palm powered screen appears you can let go of the power button then hit up for erase all data. If it does not then you know that it was one of your 3rd party programs/settings.