Pedro68

Try different software first [cause its cheaper - in fact you should be able to test it with some FREE software]

Then try the media next [cos that will cost you a few quid - unless you can persuade someone to chuck a single blank disc your way]

Finally, try transferring the file (on a memory stick) to another PC (if you have access to another) and try burning on that PC as I suppose your burner could be a prob (possibly?!)