Thanks for the comment. In reply, I do not run anything else while reading. So it has to be something in the background. Got no idea what though. Unless it is AVG antivirus software???? I'll try turning that off next time and see what happens.
I only burn video related content. But will try some audio to see what happens.
Re the media, I normally only use Verbatim, but grabbed these things in an emergencey recently. However, had the same issue with Verbatim anyway.
Finally, can you tell if the problem is being created at the read stage or the burning stage?
cheers and thanks again.