After many months of successful back-ups, on successive CDs, my last CD was full and I am now getting the message "The requested source is in use (0*800700AA)". I used a blank disc and then formatted it, but to no avail. I have also tried a full back-up on the new disc but with no luck. I am just backing-up documents and Email. I tried only backing-up one then the other, again unsuccessfully. I have nothing else running in the desk top apart from Broadband which is loaded automatically. Can anyone advise a solution, please?