Thanks to all who responded to my problem... I have since tried the same discs on two of my laptops using the same programs and the DVD's burnt perfectly ...

I have used the TDK DVD-R's without a problem for some time on the machine that is now giving me the problem but the suggestion from most is that I try a different make of blank DVD on this machine... This I shall try as soon as I can get in an buy an alternative and try out...

Thanks again for all of your responses,

Phil