I have just tried to make a recovery USB and I got the Error 39 message. Tried a different USB stick and still got the Error 39. I now cannot boot my desktop into XP. It comes up with a windows disk configuration error. So it looks as if my Acer One recovery disk has trashed my XP install. I have lost all my data on my XP PC just for following Acer's instructions. There must be a case for compensation.......... Chris.