I have a moment I'm working on that froze up when it was pluged into a PC. It's now frozen on the "DOWNLOADING, DO NOT TURN OFF TARGET," screen. Any suggestions on how to fix this? Hard reset? I took the battery out and turned the phone back on. Now I have a black screen with an icon of a phone...triangular, yellow error symbol...image of a computer. I took the battery out, held the down volume button, camera button, and power button. Now I'm back to the "DO NOT TURN OFF TARGET" screen.