Norton Online Back-up Error A222

Purchase NOBU yesterday with 50gb.

Running Windows XP

 

Tried running back-up twice yesterday with an error A2816

Ran again overnight. It ran for 12 hours, got to 77% (12 gb) and quit with a  Backup failed (A2222)

 

No other programs are running. I have rebooted the computer after the Error A2816 messages.