Write Error in Nero

I've got a HP8200 writer which was working fine (if you can class 4x with no buffer underrun fine) until recently when I started getting write errors at about 98%. The on-screen message simply says "Write Error" but the log says "Buffer underrun". Whilst I'm writing there is nothing else running (apart from systray & explorer) and I've got a 7,200rpm HD (defragged) and 512mb ram so I wouldn't expect BU errors anyway.

Is there anything that you can suggest other than getting something newer?
 
1. Which OS?
2. Which Nero version?
3. Is DMA enabled for the drive/IDE channel?
4. Which motherboard/chipset?
5. Latest chipset/IDE controller drivers installed?

Greetings from
Duracell
 
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