Thanks IanK - sounds like a visit to a local shop. 
Very wise H - editing the registry is not for the faint hearted.
FYI, it took around an hour to talk my sister through this on the phone so should be less than that to fix it in the shop.
Ian
And for KKOB, the only PPE you need is knee pads - you'll spend a lot of time on your knees praying its going to work.